Powder X-ray Diffraction (XRD) is one of the primary techniques used by mineralogists and solid state chemists to examine the physico-chemical make-up of unknown solids. This data is represented in a collection of single-phase X-ray powder diffraction patterns for the three most intense D values in the form of tables of interplanar spacings (D), relative intensities (I/Io), hkl plane, mineral name and chemical formuls.
The XRD technique takes a sample of the material and places a powdered sample in a holder, then the sample is illuminated with x-rays of a fixed wave-length and the intensity of the reflected radiation is recorded using a goniometer. This data is then analyzed for the reflection angle to calculate the inter-atomic spacing (D value in Angstrom units - 10-8 cm). The intensity(I) is measured to discriminate(using I ratios) the various D spacings and the results are compared to this table to identify possible matches.
For more information about this technique, see X-Ray Analysis of a Solid or take an internet course at Birkbeck College On-line Courses. Many thanks to Frederic Biret for these data.
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D1(Io)(hkl) D2(I/Io)(hkl) D3(I/Io)(hkl) Mineral Name Chemical Formula 0.7768(1) 0.7877(1) 3(1) Bowieite (Rh,Ir,Pt)1.77S3 0.779(1) 2.18(1) 0.8237(0.9) Sudburyite (Pd,Ni)Sb 0.7874(1) 0.8623(0.8) 0.8847(0.7) Rhodium (Rh,Pt) 0.8666(1)(222) 2.122(1)(110) 0.8021(0.7)(321) Skaergaardite ! CuPd 1.019(1) 1.081(0.75) 1.887(0.63) Nowackiite Cu6Zn3As4S12 1.019(1) 1.757(1) 1.91(0.8) Kalininite ZnCr2S4 1.057(1) 1.483(1) 3.527(1) Ustarasite Pb(Bi,Sb)6S10 1.066(1) 2.05(1) 9.63(1) Freboldite CoSe 1.089(1) 1.846(1) 2.371(0.9) Ferdisilicite * FeSi2 1.12(1) 2.72(1) 5.44(1) Arsenolamprite As 1.142(1) 1.094(0.8) 2.18(0.8) Chengdeite Ir3Fe 1.156(1) 2(0.9) 1.003(0.7) Gupeiite Fe3Si 1.16(1) 2.02(1) 1.43(0.8) Chromferide Fe3Cr1-x (x=0,6) 1.163(1) 2.228(0.9) 1.932(0.7) Isoferroplatinum (Pt,Pd)3(Fe,Cu) 1.195(1) 2.24(1) 0.797(0.9) Tetra-auricupride AuCu 1.196(1) 1.991(1) 1.817(0.9) Fersilicite * FeSi 1.202(1) 2.295(1) 1.408(0.9) Atokite (Pd,Pt)3Sn 1.202(1) 2.295(1) 1.408(0.9) Rustenburgite (Pt,Pd)3Sn 1.22(1) 2.13(1) 1.35(0.6) Osmium (Os,Ir) 1.299(1) 2.163(1) 1.529(0.8) Khamrabaevite (Ti,V,Fe)C 1.306(1) 4.62(1) 16(1) Perlialite K8Tl4Al12Si24O72·20(H2O) 1.331(1)(800) 3.07(1)(222) 1.884(0.8)(440) Maikainite ! Cu20(Fe,Cu)6Mo2Ge6S32 1.3346(1) 2.243(0.9) 3.516(0.9) Baotite Ba4(Ti,Nb)8Si4O28Cl 1.375(1) 3.23(1) 3.55(1) Julienite * Na2Co++(SCN)4·8(H2O) 1.386(1) 2.75(1) 2.88(0.7) Olkhonskite (Cr+++,V+++)2Ti3O9 1.388(1) 4.27(1) 2.19(0.9) Jeremejevite Al6B5O15(F,OH)3 1.39(1) 2.41(1) 10.8(1) Glucine CaBe4(PO4)2(OH)4·0.5(H2O) 1.391(1)(-462) 2.39(0.87)(-132) 2.678(0.71)(151) Zincostaurolite ! [ ]4Zn4Al16(Al,[ ])2Si8O40[O6,(OH)2] 1.393(1) 1.418(1) 2.11(1) Akdalaite (Al2O3)4·(H2O) 1.4(1) 1.49(1) 2.49(0.5) Leadamalgam HgPb2 1.43(1) 1.62(1) 2.99(1) Augite (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 1.44(1) 2.14(1) 2.25(0.9) Mathiasite (K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38 1.44(0.9) 2.84(0.9) 1.69(0.85) Romanite * (Fe++,U,Pb)2(Ti,Fe+++)O4 1.45(1) 2.48(1) 2.043(0.9) Bityite CaLiAl2(AlBeSi2)O10(OH)2 1.485(1) 9.77(1) 3.17(1) Brammallite * (Na,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)] 1.486(1) 2.05(1) 2.15(1) Niggliite PtSn 1.487(1) 1.593(1) 2.9(0.9) Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2·(H2O) 1.494(1) 2.92(0.8) 8.3(0.6) Chrysocolla (Cu,Al)2H2Si2O5(OH)4·n(H2O) 1.495(1) 1.204(0.9) 2.83(0.7) Luanheite Ag3Hg 1.503(1) 2.572(1) 2.457(0.7) Preiswerkite NaMg2Al3Si2O10(OH)2 1.506(1) 2.485(1) 1.483(0.9) Mangan-neptunite KNa2Li(Mn,Fe++)2Ti2Si8O24 1.508(1) 3.02(1) 1.793(0.7) Calciotantite Ca(Ta,Nb)4O11 1.511(1) 2.6(0.9) 5.2(0.85) Takeuchiite Mg2Mn+++O2(BO3) 1.516(1) 2.163(1) 3.19(1) Babefphite BaBe(PO4)(F,O) 1.519(1) 2.6(1) 4.52(0.8) Chromphyllite ! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 1.52(1) 4.56(1) 15.4(1) Nontronite Na0.3Fe+++2(Si,Al)4O10(OH)2·n(H2O) 1.522(1)(20-6,135,33-1,06 2.41(1)(201,13-2) 3.36(0.9)(022,003) Shirokshinite ! K(NaMg2)Si4O10F2 1.53(1) 4.58(1) 15.8(0.8) Hectorite Na0,3(Mg,Li)3Si4O10(OH)2 1.539(1) 1.804(1) 2.94(1) Tazheranite CaTiZr2O8 1.54(1) 2.35(0.6) 2.66(0.6) Mcgovernite Mn9Mg4Zn2As2Si2O17(OH)14 1.54(1) 2.58(1) 2.88(0.6) Majorite Mg3(Fe,Al,Si)2(SiO4)3 1.54(1) 2.58(1) 2.88(0.6) Pyrope Mg3Al2(SiO4)3 1.54(1) 2.67(1) 15.4(1) Sauconite Na0,3Zn3(Si,Al)4O10(OH)2·4(H2O) 1.54(1) 3.59(1) 4.36(1) Neotocite (Mn,Fe++)SiO3·(H2O) (?) 1.544(1)(3-3-1,33-1,060) 2.556(1)(201,1-3-2,13-2) 2.992(0.6)(11-4) Glagolevite ! NaMg6[Si3AlO10](OH,O)8·H2O 1.55(1) 2.522(1) 1.805(0.92) Sabelliite ! Cu2Zn(As,Sb)O4(OH)3 1.552(1) 1.818(1) 2.95(1) Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) 1.574(1) 2.62(1) 2.92(0.9) Calderite (Mn++,Ca)3(Fe+++,Al)2(SiO4)3 1.587(1) 1.84(1) 3.04(1) Cesstibtantite (Cs,Na)SbTa4O12 1.59(1) 1.8(1) 2.13(1) Lindsleyite (Ba,Sr)(Ti,Cr,Fe,Mg)21O38 1.609(1) 3.159(1) 2.633(0.8) Cobaltaustinite CaCo(AsO4)(OH) 1.61(1) 2.52(1) 2.95(1) Maghemite gamma-Fe+++2O3 1.618(1) 1.873(1) 2.645(1) Zavaritskite BiOF 1.62(1) 2.14(1) 2.95(1) Bismutite Bi2(CO3)O2 1.62(1) 2.71(1) 3.03(0.8) Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) 1.625(1) 2.14(1) 2.102(0.6) Pseudosinhalite ! Mg2Al3B2O9(OH) 1.629(1) 2.659(1) 5.3(1) Murdochite PbCu6O8-x(Cl,Br)2x 1.6332(1) 2.709(0.85) 2.423(0.65) Pyrite FeS2 1.635(1) 3.311(1) 7.4(1) Akaganeite Fe+++(O,OH,Cl) 1.635(1) 4(0.98) 2.33(0.69) Nsutite (Mn++++1-x)(Mn++x)(O2-2x)(OH2x) where x = 0.06-0.07 1.64(1) 1.39(0.95) 2.84(0.85) Simpsonite Al4(Ta,Nb)3O13(OH) 1.667(1) 2.539(0.9) 2.79(0.8) Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe+++)3O12 1.67(1) 1.42(0.6) 2.16(0.6) Kleberite * FeTi6O13·4(H2O) (?) 1.67(1) 2.67(0.97) 3.63(0.96) Eskolaite Cr2O3 1.674(1) 2.36(0.9) 2.85(0.9) Polydymite NiNi2S4 1.68(1) 1.83(0.6) 2.87(0.5) Fletcherite Cu(Ni,Co)2S4 1.68(1) 2.59(1) 2.77(0.8) Cobaltite CoAsS 1.68(1)(113) 2.79(0.96)(200) 1.97(0.52)(220) Bravoite ? (Fe,Ni,Co)S2 1.683(1) 2.58(1) 2.82(0.9) Yafsoanite Ca3Te2Zn3O12 1.686(1) 2.481(0.8) 2.183(0.7) Pseudorutile Fe+++2Ti3O9 1.688(1) 1.511(0.6) 2.673(0.6) Schallerite Mn++16[As+++O2OH][Si12O30](OH)14 1.69(1) 1.7(1) 1.435(0.9) Davidite-(Ce) (Ce,La)(Y,U)(Ti,Fe+++)20O38 1.69(1) 3.21(0.8) 2.48(0.6) Belyankinite Ca1-2(Ti,Zr,Nb)5O12·9(H2O) (?) 1.692(0.4) 2.48(0.3) 3.21(0.2) Manganbelyankinite (Mn,Ca)(Ti,Nb)5O12·9(H2O) 1.694(1) 3.258(0.8) 2.985(0.7) Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) 1.695(1) 3.25(0.8) 2.81(0.7) Laurite RuS2 1.707(1) 3.28(1) 2.52(0.9) Struverite (Ti,Ta,Fe+++)O2 1.71(1) 3.729(0.9) 2.709(0.7) Natanite Fe++Sn++++(OH)6 1.713(1) 2.01(1) 2.69(0.9) Maucherite Ni11As8 1.72(1) 2.09(0.9) 2.92(0.5) Gagarinite-(Y) NaCaY(F,Cl)6 1.72(1) 2.456(1) 4.23(1) Hisingerite Fe+++2Si2O5(OH)4·2(H2O) 1.72(1) 3.26(0.9) 2.55(0.8) Ordonezite ZnSb2O6 1.74(1) 2.56(0.8) 3.33(0.8) Ferrotapiolite (Fe++,Mn++)(Ta,Nb)2O6 1.74(1) 2.56(0.8) 3.33(0.8) Tapiolite * (Fe,Mn)(Ta,Nb)2O6 1.74(1) 2.87(1) 3.31(1) Hollingworthite (Rh,Pt,Pd)AsS 1.74(1) 2.87(1) 3.32(1) Irarsite (Ir,Ru,Rh,Pt)AsS 1.74(1) 3.7(0.7) 5.02(0.7) Clinohumite (Mg,Fe++)9(SiO4)4(F,OH)2 1.743(1) 2.869(1) 2.651(0.7) Sonolite Mn9(SiO4)4(OH,F)2 1.744(0.9) 2.61(0.8) 3.3(0.7) Bezsmertnovite Au4Cu(Te,Pb) 1.746(1) 2.896(0.9) 3.345(0.8) Platarsite (Pt,Rh,Ru)AsS 1.75(1) 1.9(0.7) 2.98(0.6) Malanite Cu(Pt,Ir)2S4 1.75(1) 2.6(0.8) 3.33(0.8) Varlamoffite * (Sn,Fe)(O,OH)2 1.75(1) 2.85(1) 2.43(0.7) Gehlenite Ca2Al(AlSi)O7 1.755(1) 1.852(0.9) 1.549(0.8) Polkanovite ! Rh12As7 1.755(1) 2.48(1) 3(0.8) Trustedtite Ni3Se4 1.758(1) 3(1) 1.009(0.9) Cuprorhodsite CuRh2S4 1.76(1) 3(1) 2.489(0.9) Cuproiridsite CuIr2S4 1.763(1) 2.98(1) 2.459(0.9) Konderite PbCu3(Rh,Pt,Ir)8S16 1.763(1) 3.008(1) 1.918(0.8) Cobaltpentlandite Co9S8 1.765(1) 2.85(0.8) 3.24(0.6) Roshchinite Ag19Pb10Sb51S96 or Pb(Ag,Cu)2(Sb,As)5S10 1.765(1) 3(0.8) 5.8(0.8) Xingzhongite (Pb,Cu,Fe)(Ir,Pt,Rh)2S4 1.766(1) 2.667(1) 3.099(1) Yftisite-(Y) ? (Y,Dy,Er)4(Ti,Sn)O(SiO4)2(F,OH)6 1.768(1) 3.01(1) 2.5(0.8) Florensovite Cu(Cr1.5Sb0.5)S4 1.769(1) 2.501(0.9) 2.886(0.7) Tyrrellite (Cu,Co,Ni)3Se4 1.77(1) 3.02(0.8) 2.51(0.6) Daubreelite Fe++Cr2S4 1.774(1)(440) 3.02(0.9)(311) 2.24(0.9)(420) Miassite ! Rh17S15 1.775(1) 3.03(0.8) 1.931(0.5) Pentlandite (Fe,Ni)9S8 1.776(1) 8.7(1) 3.07(0.9) Vozhminite (Ni,Co)4(As,Sb)S2 1.779(1) 2.89(0.9) 2.95(0.9) Weberite Na2MgAlF7 1.782(1) 2.332(0.8) 3.102(0.8) Welinite-III Mn++6(W++++++,Mg)2Si2(O,OH)14 1.782(1) 2.332(0.8) 3.102(0.8) Welinite-VIII (Mn++,Mg)3(W++++++,Mn+++)1-x(SiO4)(O,OH)3 (x=1/3) 1.7823(1) 3.393(0.89) 2.513(0.79) Manganhumite (Mn,Mg)7(SiO4)3(OH)2 1.791(0.8)(223) 2.32(0.8)(11-6) 1.744(0.8)(626) Felbertalite ! Cu2Pb6Bi8S19 1.796(1) 2.552(0.8) 2.873(0.8) Ribbeite (Mn++,Mg)5(SiO4)2(OH)2 1.797(1) 1.325(0.8) 2.222(0.8) Zoubekite AgPb4Sb4S10 1.798(1) 1.996(0.8) 3.443(0.2) Ertixiite Na2Si4O9 1.799(1) 2.86(0.8) 2.598(0.6) Alleghanyite Mn5(SiO4)2(OH)2 1.8(1)(-602) 1.775(0.9)(-404) 1.745(0.8)(331) Vincentite (Pd,Pt)3(As,Sb,Te) 1.8(1) 2.02(1) 2.7(1) Wilkmanite Ni3Se4 1.801(1) 1.148(0.7) 2.98(0.6) Sperrylite PtAs2 1.801(1) 2.945(1) 1.537(0.9) Calzirtite CaZr3TiO9 1.804(1) 2.892(1) 3.707(0.6) Nordenskioldine CaSnB2O6 1.806(1) 2.557(1) 2.869(0.78) Jerrygibbsite (Mn,Zn)9(SiO4)4(OH)2 1.806(1) 2.877(0.9) 2.684(0.8) Leucophoenicite Mn7(SiO4)3(OH)2 1.81(1) 3.27(1) 3.16(0.9) Nasonite Pb6Ca4Si6O21Cl2 1.811(1) 2.644(1) 3.519(1) Chernovite-(Y) YAsO4 1.813(1) 1.146(0.9) 2.99(0.9) Tolovkite IrSbS 1.818(1) 3.12(0.8) 4.17(0.8) Tungusite Ca14(OH)8(Si8O20)3Fe++9(OH)14 1.819(1) 2.24(1) 3.17(1) Argentite * Ag2S 1.82(1)(103) 3.445(0.89)(100) 1.988(0.82)(110) Rambergite ! MnS 1.828(1) 2.985(0.7) 2.372(0.6) Djerfisherite K6Na(Fe,Cu,Ni)25S26Cl 1.83(1) 2.81(1) 3.09(1) Plombierite Ca5H2Si6O18·6(H2O) (?) 1.83(1) 2.89(0.9) 1.66(0.8) Heazlewoodite Ni3S2 1.832(1) 2.93(0.9) 3.08(0.8) Betekhtinite Cu10(Fe,Pb)S6 1.834(1) 2.193(1) 3.261(0.9) Chukhrovite-(Y) Ca3(Y,Ce)Al2(SO4)F13·10(H2O) 1.835(1) 2.378(0.9) 2.996(0.9) Owensite (Ba,Pb)6(Cu,Fe,Ni)25S27 1.838(1) 0.929(0.9) 1.077(0.8) IMA2004-047 ! PdAsSe 1.839(1) 7.67(1) 2.34(0.9) Chlormagaluminite (Mg,Fe++)4Al2(OH)12(Cl2,CO3)·2(H2O) 1.842(1) 2.637(0.9) 2.569(0.8) Zirsinalite Na6(Ca,Mn,Fe++)Zr[Si6O18] 1.849(1) 3.09(0.8) 4.6(0.8) Caledonite Pb5Cu2(CO3)(SO4)3(OH)6 1.85(1) 2.63(0.8) 2.69(0.8) Glaucochroite CaMnSiO4 1.854(1) 2.827(1) 3.014(1) Saryarkite-(Y) Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7·6(H2O) 1.856(1) 2.8(1) 3.5(1) Plattnerite PbO2 1.858(1) 3.17(1) 2.018(0.4) Argentopentlandite Ag(Fe,Ni)8S8 1.86(1) 2.75(0.7) 2.51(0.6) Changchengite ! IrBiS 1.867(1) 1.593(0.99) 2.642(0.65) Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) 1.867(1) 3.445(1) 1.97(0.9) Calciborite CaB2O4 1.87(1) 3.04(1) 1.59(0.5) Arsenosulvanite Cu3(As,V)S4 1.871(1) 1.964(0.9) 2.387(0.9) Djurleite Cu31S16 1.874(1) 1.471(0.69) 2.365(0.69) Brizziite-III NaSb+++++O3 1.874(1) 1.471(0.69) 2.365(0.69) Brizziite-VII NaSb+++++O3 1.875(1) 2.93(0.8) 1.812(0.7) Luberoite Pt5Se4 1.875(1) 3.198(1) 2.041(0.81) Palladseite Pd17Se15 1.877(1) 1.959(0.9) 1.998(0.8) Novakite (Cu,Ag)21As10 1.88(1) 1.9746(0.7) 2.403(0.7) Chalcocite Cu2S 1.886(1) 2.67(1) 7.57(1) Borcarite Ca4MgB4O6(OH)6(CO3)2 1.887(1) 4.897(1) 2.342(0.88) Zincalstibite ! Zn2AlSb(OH)12 1.89(1) 1.83(0.9) 2(0.9) Synchysite-(Y) CaY(CO3)2F 1.89(1) 3.28(0.9) 2.54(0.6) Eglestonite Hg6Cl3O(OH) (?) 1.89(1) 3.7(0.8) 3.18(0.6) Gerasimovskite (Mn,Ca)(Nb,Ti)5O12·9(H2O) (?) 1.892(1) 1.98(1) 3.08(1) Hypercinnabar HgS 1.892(1) 3.79(1) 1.87(0.8) Osarsite (Os,Ru)AsS 1.899(1) 3.061(0.55) 2.767(0.35) Yarrowite Cu9S8 1.9(1) 2.5(1) 2.6(1) Hastite CoSe2 1.902(1) 3.335(0.8) 2.903(0.75) Reinhardbraunsite Ca5(SiO4)2(OH,F)2 1.904(1) 3.11(0.8) 1.625(0.4) Chatkalite Cu6Fe++Sn2S8 1.91(1) 2.211(1) 4.52(1) Hongshiite * PtCu 1.91(1) 3.076(0.85) 2.777(0.3) Spionkopite Cu1.4S 1.915(1) 2.63(1) 2.67(0.8) Omeiite (Os,Ru)As2 1.916(1) 2.31(1) 2.047(0.99) Ekaterinite Ca2B4O7(Cl,OH)2·2(H2O) 1.918(1) 1.977(1) 2.11(0.4) Orcelite Ni5-xAs2 (x=0.23) 1.918(1) 2.174(1) 3.33(1) Genthelvite Zn4Be3(SiO4)3S 1.918(1) 2.71(0.5) 3.83(0.35) Neighborite NaMgF3 1.92(1) 1.095(0.9) 1.501(0.9) Anduoite (Ru,Os)As2 1.924(1) 1.977(1) 2.15(0.65) Perryite (Ni,Fe)8(Si,P)3 1.925(1) 3.145(0.9) 3.282(0.9) Geffroyite (Ag,Cu,Fe)9(Se,S)8 1.926(1) 1.469(0.9) 2.366(0.9) Satpaevite Al12V++++2V+++++6O37·30(H2O) 1.93(1) 1.132(0.9) 1.235(0.8) Gaotaiite Ir3Te8 1.93(1) 2.92(0.6) 8.12(0.6) Bultfonteinite Ca2SiO2(OH,F)4 1.93(1) 2.98(1) 3.27(1) Juanite Ca10Mg4Al2Si11O39·4(H2O) (?) 1.931(1) 3.153(0.94) 1.647(0.35) Fluorite CaF2 1.9322(1)(102) 2.9159(0.602)(100) 1.6835(0.449)(110) Jaipurite * CoS 1.933(1) 2.375(0.9) 1.857(0.8) Roxbyite Cu1.78S 1.937(1) 3.18(0.6) 2.74(0.5) Bornite Cu5FeS4 1.937(1) 3.21(1) 2.01(0.9) Huanghoite-(Ce) BaCe(CO3)2F 1.94(1) 1.72(0.6) 2.92(0.4) Geversite Pt(Sb,Bi)2 1.94(1) 4.086(0.51) 2.436(0.39) Stalderite TlCu(Zn,Fe,Hg)2As2S6 1.941(1) 2.747(0.95) 3.883(0.6) Cryolite Na3AlF6 1.942(1) 2.63(1) 2.53(0.8) Oenite ! CoSbAs 1.945(1) 2.4(1) 3.02(1) Chvilevaite Na(Cu,Fe,Zn)2S2 1.948(1) 2.78(1) 3.43(0.75) Bastnasite-(Y) Y(CO3)F 1.952(1) 3.18(1) 1.671(0.5) Mgriite Cu3AsSe3 1.955(1) 1.25(0.8) 1.735(0.8) Mayingite IrBiTe 1.956(1) 2.742(1) 2.688(0.8) Chrisstanleyite ! Ag2Pd3Se4 1.956(1) 3.104(0.68) 2.759(0.53) IMA2001-002 ! Cu17Bi17S35 1.96(1) 2.21(0.8) 4.29(0.8) Cryolithionite Na3Li3Al2F12 1.96(1) 2.77(0.65) 3.2(0.57) Anilite Cu7S4 1.96(1) 3.19(0.95) 1.671(0.8) Eskebornite CuFeSe2 1.965(1) 3.058(1) 3.24(1) Fergusonite-beta-(Ce) (Ce,La,Nd)NbO4 1.968(1)(062) 1.39(0.82)(462) 2.39(0.5)(132) Magnesiostaurolite ! [ ]4Mg4Al16(Al,[ ])2Si8O40[O6,(OH)2] 1.973(1) 2.79(0.4) 3.21(0.4) Digenite Cu9S5 1.976(1) 1.297(0.6) 2.087(0.6) Hexaferrum ! (Fe,Os,Ru,Ir) 1.982(1) 2.917(0.9) 2.846(0.6) Larosite (Cu,Ag)21(Pb,Bi)2S13 1.988(1) 2.65(1) 2.19(0.7) Majakite PdNiAs 1.989(1) 2.11(0.4) 2.25(0.2) Algodonite Cu6As 1.99(1) 2.435(1) 1.42(0.6) Surinamite (Mg,Fe++)3Al4BeSi3O16 1.99(1) 2.7(0.8) 2.96(0.8) Insizwaite Pt(Bi,Sb)2 2(1) 1.92(0.8) 1.94(0.8) Xifengite Fe5Si3 2(1) 3.38(1) 3.4(1) Ardaite Pb19Sb13S35Cl7 2.001(1) 2.044(0.9) 2.089(0.8) Koutekite Cu5As2 2.003(1) 2.97(1) 1.778(0.8) Michenerite (Pd,Pt)BiTe 2.005(1) 1.16(0.3) 1.41(0.1) Suessite (Fe,Ni)3Si 2.006(1) 2.362(1) 4.232(1) Khaidarkanite ! Na0.34Cu4Al3(OH)14F3·2(H2O) 2.01(1) 2.06(0.7) 2.38(0.65) Cohenite (Fe,Ni,Co)3C 2.01(1) 2.32(0.9) 1.424(0.5) Griceite LiF 2.01(1) 2.791(0.5) 2.508(0.4) Sheldrickite ! NaCa3(CO3)2F3·(H2O) 2.01(1) 2.98(0.75) 3.33(0.7) Aurostibite AuSb2 2.017(1) 3.11(1) 2.786(0.8) Bariosincosite ! Ba(V++++O)2(PO4)2·4(H2O) 2.02(1) 2.09(1) 2.35(1) Calcio-ancylite-(Ce) CaCe(CO3)2(OH)·(H2O) 2.02(1) 2.81(0.7) 3.11(0.7) Korzhinskite CaB2O4·(H2O) 2.02(1) 3.32(0.9) 1.726(0.8) Berzelianite Cu2Se 2.023(1) 2.863(1) 3.53(0.5) Mummeite Ag3CuPbBi6S13 or Ag2Cu2Pb2Bi6S13 2.0268(1) 1.1702(0.3) 1.4332(0.2) Iron Fe 2.03(1) 1.967(0.6) 1.435(0.3) Kamacite alpha-(Fe,Ni) 2.03(1) 2.85(1) 3.54(0.8) Thorbastnasite Th(Ca,Ce)(CO3)2F2·3(H2O) 2.03(1) 2.86(0.7) 3.52(0.6) Vulcanite CuTe 2.034(1) 1.762(0.42) 1.246(0.21) Nickel Ni 2.039(1) 1.177(0.3) 0.912(0.2) Chromium Cr 2.04(1) 1.17(0.9) 0.77(0.8) Ferchromide Cr3Fe1-x(x=0,6) 2.04(1) 5.1(1) 10.1(0.6) Uranocircite Ba(UO2)2(PO4)2·12(H2O) 2.05(1) 1.347(0.8) 2.19(0.7) Jedwabite ! Fe7(Ta,Nb)3 2.05(1) 1.888(0.7) 1.965(0.5) Domeykite Cu3As 2.05(1) 2.17(0.5) 2.38(0.3) Isovite ! (Cr,Fe)23C6 2.05(1) 3.09(1) 3.47(1) Sulfoborite Mg3B2(SO4)(OH)8(OH,F)2 2.056(1) 2.343(0.4) 2.142(0.35) Ruthenium (Ru,Ir,Os) 2.057(1) 2.635(0.9) 2.966(0.9) Pyrrhotite Fe(1-x)S (x=0-0.17) 2.058(1) 3.044(0.7) 2.72(0.5) Boracite Mg3B7O13Cl 2.06(1) 1.261(0.25) 1.0754(0.16) Diamond C 2.06(1) 1.72(0.75) 2.64(0.75) Heideite (Fe,Cr)1+x(Ti,Fe)2S4 2.06(1) 1.78(0.3) 1.26(0.2) Awaruite Ni2Fe to Ni3Fe 2.06(1) 2.19(1) 1.26(0.75) Lonsdaleite C 2.06(1) 3.38(0.8) 1.763(0.7) Bellidoite Cu2Se 2.06(1) 3.76(0.8) 2.329(0.6) Aerugite ([ ],Ni)9(AsO4)2(AsO6) (?) 2.06(1)(402,106) 4.36(1)(200) 3.04(1)(203) Zemkorite (Na,K)2Ca(CO3)2 2.061(1) 2.337(0.91) 2.189(0.61) Bromellite BeO 2.061(1) 2.696(0.7) 2.124(0.5) Ruthenarsenite (Ru,Ni)As 2.065(1) 3.003(0.9) 3.326(0.9) Itoite Pb3[GeO2(OH)2](SO4)2 2.068(1) 1.463(0.8) 2.394(0.8) Carlsbergite CrN 2.07(1) 2.56(0.5) 2.82(0.4) Cuprostibite Cu2(Sb,Tl) 2.07(1) 2.69(0.8) 2.85(0.8) Vurroite ! Pb21SnAs11Bi11S50Cl8Se 2.07(1) 3.19(1) 3.5(1) Banalsite BaNa2Al4Si4O16 2.07(1) 3.36(0.6) 1.988(0.4) Rickardite Cu7Te5 2.076(1) 2.858(0.7) 4.85(0.65) Shomiokite-(Y) Na3Y(CO3)3·3(H2O) 2.078(1) 2.259(1) 2.702(0.9) Kutinaite Cu14Ag6As7 2.08(1) 1.08(0.8) 1.8(0.8) Taenite gamma-(Fe,Ni) 2.0803(1) 1.3732(0.4) 2.1574(0.4) Danbaite CuZn2 2.085(1) 2.552(0.9) 1.601(0.8) Corundum Al2O3 2.088(1) 1.808(0.46) 1.278(0.2) Copper Cu 2.088(1) 2.41(0.91) 1.476(0.57) Bunsenite NiO 2.089(1) 1.201(0.8) 1.044(0.6) Zhanghengite (Cu,Zn,Fe,Al,Cr) 2.09(1) 2.01(0.7) 3.61(0.7) Weissite Cu1.9Te 2.09(1) 2.66(0.6) 1.72(0.5) Troilite FeS 2.09(1) 2.93(0.8) 2.98(0.8) Montbrayite (Au,Sb)2Te3 2.091(1) 2.473(0.53) 2.308(0.4) Zinc Zn 2.096(1)(114) 1.665(0.8)(300) 6.11(0.8)(002) Edgarite ! FeNb3S6 2.1(1) 2.153(0.8) 1.815(0.7) Tongxinite * Cu2Zn 2.105(1) 2.226(0.34) 2.388(0.32) Rhenium * Re 2.106(1) 1.489(0.52) 1.216(0.12) Periclase MgO 2.115(1) 2.355(0.8) 1.351(0.5) Stillwaterite Pd8As3 2.116(0.4)(062) 2.325(0.4)(052) 4.373(0.4)(130) Tischendorfite ! Pd8Hg3Se9 2.118(1) 3.456(1) 1.804(0.6) Cameronite AgCu7Te10 2.119(1) 2.314(1) 1.991(0.7) Oregonite Ni2FeAs2 2.12(1) 2.4492(0.72) 1.4997(0.45) Osbornite TiN 2.13(1) 2.34(0.6) 1.41(0.4) Arsenopalladinite Pd8(As,Sb)3 2.13(1) 7.61(1) 2.97(0.9) Uralborite CaB2O2(OH)4 2.131(1) 2.875(1) 3.39(1) Crichtonite (Sr,La,Ce,Y)(Ti,Fe+++,Mn)21O38 2.134(1) 2.332(1) 3.01(1) Nabiasite ! BaMn9[(V,As)O4]6(OH)2 2.14(1) 1.62(0.9) 3.24(0.7) Sinhalite MgAlBO4 2.14(1) 2.21(0.9) 2.6(0.7) Palladoarsenide Pd2As 2.144(1) 1.081(0.8) 1.529(0.7) Hongquiite * TiO 2.146(1) 1.518(0.8) 2.476(0.7) Wustite FeO 2.15(1) 2.29(0.55) 2.36(0.4) Taimyrite (Pd,Cu,Pt)3Sn 2.151(1) 2.356(1) 1.863(0.8) Haxonite (Fe,Ni)23C6 2.156(1) 3.043(0.8) 7.03(0.6) Henryite Cu4Ag3Te4 2.16(1) 2.55(0.8) 3.03(0.7) Stutzite Ag5-xTe3,(x=0.24-0.36) 2.16(1) 3.93(0.75) 2.78(0.63) Antarcticite CaCl2·6(H2O) 2.166(1) 3.387(1) 1.925(0.8) Stenonite (Sr,Ba,Na)2Al(CO3)F5 2.167(1) 2.356(0.9) 0.86(0.8) Isomertieite Pd11Sb2As2 2.17(1) 1.995(0.7) 1.955(0.7) Nickelphosphide ! (Ni,Fe)3P 2.172(1) 2.708(1) 2.648(0.9) Crawfordite Na3Sr(PO4)(CO3) 2.176(1) 2.544(0.9) 3.146(0.9) Ungarettiite NaNa2(Mn++2Mn+++3)Si8O22O2 2.179(1) 1.094(0.8) 1.163(0.8) Tulameenite Pt2FeCu 2.18(1)(112,-123,-401) 2.14(0.8)(221,-403,-223,0 2.72(0.8)(120,013) Ferriallanite-(Ce) ! CaCe(Fe+++,Fe++,Al)3[SiO4][Si2O7]O(OH) 2.18(1) 2.23(1) 2.67(1) Kotoite Mg3B2O6 2.19(1) 1.972(0.7) 2.1(0.7) Schreibersite (Fe,Ni)3P 2.19(1) 2.09(0.8) 1.56(0.5) Cesarolite PbH2Mn++++3O8 2.191(1) 1.144(0.85) 1.897(0.75) Roaldite (Fe,Ni)4N 2.191(1) 1.92(0.7) 1.342(0.6) Tetraferroplatinum PtFe 2.191(1) 2.281(0.9) 1.23(0.6) Mertieite-II Pd8(Sb,As)3 2.192(1) 1.935(0.5) 1.324(0.4) Ferronickelplatinum Pt2FeNi 2.192(1) 3.027(1) 2.088(0.8) Stumpflite Pt(Sb,Bi) 2.194(1) 2.27(1) 1.577(0.5) Stibiopalladinite Pd5Sb2 2.196(1) 1.734(0.9) 7.84(0.9) Solongoite Ca2B3O4(OH)4Cl 2.2(1) 2.27(1) 1.58(0.7) Stannopalladinite (Pd,Cu)3Sn2 (?) 2.2(1) 3.78(0.7) 4.26(0.5) Tsnigriite Ag9SbTe3(S,Se)3 2.209(1) 2.746(1) 2.09(0.9) Hsianghualite Ca3Li2Be3(SiO4)3F2 2.21(1) 2.83(0.92) 2.25(0.87) Karlite ! (Mg,Al)6(BO3)3(OH,Cl)4 2.217(1) 1.9197(0.5) 1.1574(0.45) Iridium (Ir,Os,Ru,Pt) 2.218(1) 2.159(0.57) 3.087(0.38) Yuanjiangite AuSn 2.22(1) 1.986(0.4) 2.5(0.4) Palarstanide Pd8(Sn,As)3 2.22(1) 2.38(1) 1.24(0.8) Goldamalgam * (Au,Ag)Hg 2.22(1) 2.52(0.42) 2.98(0.25) Kolymite Cu7Hg6 2.22(1) 2.71(1) 2.29(0.8) Marokite CaMn+++2O4 2.22(1) 2.98(1) 5.74(0.9) Svanbergite SrAl3(PO4)(SO4)(OH)6 2.221(1) 2.227(1) 2.523(1) Belendorffite Cu7Hg6 2.222(1) 4.71(0.9) 4.35(0.7) Bayerite Al(OH)3 2.223(1) 1.571(0.6) 2.568(0.6) Manganosite MnO 2.23(1) 1.92(0.7) 1.94(0.7) Auricupride Cu3Au 2.23(1) 2.3(1) 1.207(0.6) Plumbopalladinite Pd3Pb2 2.232(1) 2.083(0.9) 2.485(0.9) Palladobismutharsenide Pd2(As,Bi) 2.233(1) 2.045(0.68) 1.923(0.42) Barringerite (Fe,Ni)2P 2.237(1) 1.306(0.5) 2.09(0.4) Telluropalladinite Pd9Te4 2.237(1) 2.067(0.8) 2.426(0.7) Rhodarsenide ! (Rh,Pd)2As 2.237(1) 6.73(0.7) 2.975(0.6) Parasibirskite ! Ca2B2O5·(H2O) 2.238(1)(112) 2.12(0.8)(211) 2.073(0.7)(103) Allabogdanite ! (Fe,Ni)2P 2.238(1) 2.97(0.9) 3.15(0.8) Jordanite Pb14(As,Sb)6S23 2.24(1) 1.331(0.3) 2.364(0.3) Titanium * Ti 2.2409(1)(414) 1.7081(0.92)(424) 2.7425(0.77)(313) Pertsevite ! Mg2(BO3)F 2.241(1) 4.21(1) 1.726(0.75) Gatumbaite CaAl2(PO4)2(OH)2·(H2O) 2.243(1) 0.9396(0.9) 1.3593(0.8) Weishanite (Au,Ag)3Hg2 2.245(1) 2.057(0.52) 1.212(0.5) Naldretteite ! Pd2Sb 2.246(1) 1.945(0.42) 1.376(0.25) Palladium Pd,Pt 2.246(1) 3.072(1) 2.112(0.8) Laitakarite Bi4(Se,S)3 2.25(1) 1.299(0.8) 1.92(0.6) Damiaoite ! PtIn2 2.251(1) 3.093(0.4) 2.127(0.2) Poubaite PbBi2Se2(Te,S)2 2.252(1) 2.272(1) 1.737(0.95) Chondrodite (Mg,Fe++)5(SiO4)2(F,OH)2 2.256(1) 1.479(0.7) 2.438(0.7) Humite (Mg,Fe++)7(SiO4)3(F,OH)2 2.26(1) 2.16(0.9) 0.791(0.4) Keithconnite Pd3-xTe(x=0.14 to 0.43) 2.26(1) 3.07(1) 2.11(0.9) Sobolevskite PdBi 2.2633(1) 3.0077(0.9) 1.9404(0.6) IMA2004-020 ! Pd4Sb3 2.265(1) 1.962(0.53) 1.1826(0.33) Platinum Pt 2.265(1) 3.02(0.9) 1.934(0.6) Genkinite (Pt,Pd)4Sb3 2.267(1) 1.263(0.6) 2.404(0.6) Paraschachnerite Ag3Hg2 2.267(1) 2.724(0.79) 1.784(0.7) IMA2004-006 ! (Ca,Na)5[(P,S)O4]3(OH,Cl) 2.269(1)(-512) 3.72(0.95)(202) 2.259(0.95)(-114) Hydroxylclinohumite ! Mg9(SiO4)4(OH,F)2 2.273(1) 0.8595(0.6) 2.42(0.5) Schachnerite Ag1.1Hg0.9 2.279(1) 2.171(0.9) 2.232(0.65) Mertieite-I Pd11(Sb,As)4 2.28(1) 2.16(0.7) 1.955(0.5) Paolovite Pd2Sn 2.281(1) 3.325(0.8) 1.795(0.78) Malladrite Na2SiF6 2.283(1) 2.163(0.4) 1.369(0.3) Tatyanaite ! (Pt,Pd,Cu)9Cu3Sn4 2.29(1) 1.37(0.4) 2.42(0.4) Dyscrasite Ag3Sb 2.29(1) 2.17(0.9) 1.23(0.8) Cabriite Pd2SnCu 2.29(1) 8(1) 13.7(1) Connellite Cu19Cl4(SO4)(OH)32·3(H2O) 2.292(1) 3.1(1) 2.111(0.75) Tetradymite Bi2Te2S 2.292(1) 3.314(1) 5.507(1) Diaboleite Pb2CuCl2(OH)4 2.3(1) 1.203(0.8) 1.99(0.6) Yixunite ! Pt3In 2.3(1) 1.728(0.9) 2.8(0.8) Amakinite (Fe++,Mg)(OH)2 2.3(1) 2.23(0.8) 1.193(0.7) Tongbaite Cr3C2 2.3(1) 2.4(1) 2.7(1) Bornhardtite Co++Co+++2Se4 2.3(1) 3.34(1) 3.56(0.8) Alamosite PbSiO3 2.301(1)(112) 2.188(0.88)(211) 2.307(0.47)(210) Florenskyite ! (Fe,Ni)TiP 2.305(1) 2.707(0.8) 2.602(0.7) Franklinfurnaceite Ca2(Fe+++,Al)Mn+++Mn++3Zn2Si2O10(OH)8 2.308(1) 4.61(0.8) 1.746(0.6) Muskoxite Mg7Fe+++4O13·10(H2O) 2.31(1) 2.87(0.8) 2.25(0.7) Hessite Ag2Te 2.315(1) 1.207(0.9) 2.011(0.8) Zvyagintsevite (Pd,Pt,Au)3(Pb,Sn) 2.315(1) 3.43(0.7) 2.81(0.4) Averievite ! Cu5(VO4)2O2·CuCl2 2.315(1) 3.52(0.9) 4.7(0.9) Cookeite LiAl4(Si3Al)O10(OH)8 2.319(1) 1.639(0.6) 1.338(0.17) Villiaumite NaF 2.325(1) 2.63(1) 2.88(1) Makinenite NiSe 2.33(1) 4.71(1) 3.98(0.9) Donbassite Al2[Al2.33][Si3AlO10](OH)8 2.331(1) 2.55(0.4) 2.79(0.3) Cadmium Cd 2.331(1) 2.844(0.9) 3.105(0.9) Franciscanite-III Mn++6V+++++2Si2(O,OH)14 2.331(1) 3.105(0.9) 2.844(0.9) Franciscanite-VIII Mn++3(V+++++,[ ])1-x(SiO4)(O,OH)3(x=0.5) 2.335(1) 4.61(0.95) 1.755(0.5) Theophrastite Ni(OH)2 2.34(1) 1.274(0.8) 1.402(0.55) Potarite PdHg 2.34(1)(110) 1.35(0.35)(112) 1.65(0.17)(200) Tantalum * Ta 2.34(1) 2.19(1) 2.06(1) Siderazot Fe5N2 2.34(1) 4.01(1) 3.64(0.9) Beryllite Be3SiO4(OH)2·(H2O) 2.34(1) 4.16(1) 3.19(0.8) Widenmannite Pb2(UO2)(CO3)3 2.345(1) 2.74(0.9) 2.794(0.9) Jalpaite Ag3CuS2 2.354(1) 2.674(0.9) 7.03(0.85) Tuliokite BaNa6Th(CO3)6·6(H2O) 2.355(1) 2.039(0.52) 1.23(0.36) Gold Au 2.359(1) 2.044(0.4) 1.231(0.26) Silver Ag 2.36(1) 1.224(0.9) 2.04(0.7) Aluminum Al 2.36(1) 1.23(0.8) 2.045(0.6) Bogdanovite (Au,Te,Pb)3(Cu,Fe) 2.36(1) 1.365(0.7) 1.236(0.6) Moschellandsbergite Ag2Hg3 2.36(1) 2.67(0.8) 2.52(0.5) Moissanite SiC 2.365(1) 4.77(0.9) 1.794(0.55) Brucite Mg(OH)2 2.37(1) 0.95(0.8) 2.1(0.8) Eugenite Ag9Hg2 2.37(1) 1.232(0.8) 2.05(0.7) Bilibinskite Au3Cu2PbTe2 2.37(1) 2.252(0.6) 2.548(0.4) Allargentum Ag1-xSbx(x=0.009-0.16) 2.37(1) 2.93(0.6) 2.14(0.5) Hibbingite (Fe,Mg)2(OH)3Cl 2.372(1) 4.83(0.9) 2.657(0.8) Cumengite Pb21Cu20Cl42(OH)40 2.373(1) 6.46(0.76) 2.845(0.55) Drysdallite Mo(Se,S)2 2.379(1) 2.572(0.8) 2.597(0.55) Safflorite (Co,Fe)As2 2.38(1) 2.74(0.8) 2.6(0.6) Poyarkovite Hg3ClO 2.38(1) 3.93(0.9) 3.8(0.8) Behoite Be(OH)2 2.384(1) 2.808(0.8) 3.176(0.8) Karibibite Fe+++2As+++4(O,OH)9 2.386(1) 5.7(0.8) 5.36(0.7) Kempite Mn2Cl(OH)3 2.389(1) 2.1(0.8) 3.638(0.8) Vasilite (Pd,Cu)16(S,Te)7 2.39(1) 2.15(0.6) 3.11(0.6) Vernadite (Mn++++,Fe+++,Ca,Na)(O,OH)2·n(H2O) 2.39(1) 2.62(1) 1.765(0.9) Trogtalite CoSe2 2.39(1) 2.763(1) 3.739(0.8) Buckhornite AuPb2BiTe2S3 2.391(1) 2.81(0.3) 1.196(0.26) Hunchunite ! (Au,Ag)2Pb 2.393(1) 3.078(1) 3.8(0.9) Rohaite TlCu5SbS2 2.399(1) 1.654(0.8) 3.11(0.8) Cryptomelane K(Mn++++,Mn++)8O16 2.404(1)(111) 4.089(1)(110) 2.632(0.33)(130) Tsumgallite ! GaO(OH) 2.405(1) 1.701(0.45) 2.778(0.34) Lime CaO 2.406(1) 7.017(0.98) 3.136(0.92) Manjiroite (Na,K)(Mn++++,Mn++)8O16·n(H2O) 2.408(1) 1.419(0.8) 2.052(0.7) Magnesiotaaffeite-6N3S (Mg,Fe++,Zn)2Al6BeO12 2.41(1) 1.537(0.6) 2.3(0.5) Maldonite Au2Bi 2.41(1) 2.19(0.85) 3.48(0.6) Romanechite (Ba,H2O)2(Mn++++,Mn+++)5O10 2.41(1) 4.47(1) 3.132(0.3) Reichenbachite Cu++5(PO4)2(OH)4 2.42(1) 1.425(0.8) 2.6(0.8) Zincohogbomite-2N2S ! (Zn,Fe++)(2-2x)(Ti)xAl4O8 2.42(1) 2.1(0.5) 3.05(0.4) Telargpalite (Pd,Ag)3Te 2.42(1) 2.71(1) 2.85(0.8) Crednerite CuMnO2 2.42(1) 2.85(0.9) 1.55(0.6) Ferronigerite-2N1S (Zn,Mg,Fe++)(Sn,Zn)2(Al,Fe+++)12O22(OH)2 2.422(1) 2.856(0.8) 1.426(0.5) Ferrotaaffeite-6N3S (Fe++,Zn,Mg)2Al6BeO12 2.423(1) 2.246(0.9) 1.371(0.8) Atheneite (Pd,Hg)3As 2.423(1) 2.846(0.9) 1.414(0.5) Magnesionigerite-2N1S (Mg,Zn,Fe+++,Al)4(Sn,Fe+++)2Al10O22(OH)2 2.423(1) 2.846(0.9) 1.414(0.5) Magnesionigerite-6N6S (Mg,Zn,Fe+++,Al)4(Sn,Fe+++)2Al10O22(OH)2 2.427(1)(114) 2.603(0.88)(016) 1.43(0.56)(220) Ferrohogbomite-2N2S ! (Fe++,Zn,Mg,Al)6Al14(Ti,Fe)2O30(OH)2 2.43(1) 1.426(0.8) 1.436(0.6) Magnesiohogbomite-2N3S (Mg,Fe++)1.4Ti0.3Al4O8 2.43(1) 1.428(0.8) 2.05(0.8) Magnesiotaaffeite-2N2S Mg3Al8BeO16 2.43(1) 1.43(0.5) 2.6(0.5) Magnesiohogbomite-2N2S (Al,Fe++,Fe+++,Mg,Ti,Zn)11O15(OH) 2.43(1) 2.24(0.5) 1.838(0.3) Palladodymite ! (Pd,Rh)2As 2.43(1) 2.88(0.5) 1.48(0.4) Aguilarite Ag4SeS 2.43(1) 3.24(1) 8.27(1) Calclacite Ca[Cl2/CH3COO]·10(H2O) 2.43(1) 3.469(0.9) 2.744(0.85) Liebenbergite (Ni,Mg)2SiO4 2.435(1) 1.869(0.9) 5.71(0.8) Dayingite ? CuCoPtS4 2.436(1) 2.021(0.7) 1.429(0.6) Spinel MgAl2O4 2.438(1) 2.861(0.84) 1.429(0.43) Gahnite ZnAl2O4 2.438(1) 3.722(0.9) 3.475(0.5) Holtedahlite Mg12(PO3OH,CO3)(PO4)5(OH,O)6 2.44(1) 1.434(0.6) 2.87(0.6) Magnesiohogbomite-6N6S (Mg,Fe++)1.4Ti0.3Al4O8 2.44(1) 4.3(1) 11.5(1) Ilmajokite (Na,Ce,La,Ba)2TiSi3O5(OH)10·n(H2O) (?) 2.4446(1) 2.0106(0.85) 2.01(0.61) Khmaralite ! (Mg,Al,Fe)16(Al,Si,Be)12O40 2.445(1) 4.82(1) 9.6(1) Asbolane (Co,Ni)1-y(Mn++++O2)2-x(OH)2-2y+2x·n(H2O) 2.447(1) 1.434(0.58) 2.028(0.58) Ringwoodite Mg2SiO4 2.448(1) 2.952(1) 4.37(0.7) Purpurite Mn+++PO4 2.45(1) 1.97(0.6) 2.25(0.6) Ferrihydrite Fe+++2O3·0.5(H2O) 2.45(1) 2.04(0.7) 1.44(0.6) Wadsleyite (Mg,Fe++)2SiO4 2.45(1) 2.68(1) 1.806(0.9) Penroseite (Ni,Co,Cu)Se2 2.45(1) 2.97(0.9) 4.9(0.9) Adamite Zn2(AsO4)(OH) 2.45(1) 4.72(0.9) 1.826(0.6) Pyrochroite Mn(OH)2 2.452(1) 4.31(0.9) 3.46(0.85) Heterosite Fe+++PO4 2.453(1)(620) 2.589(0.5)(224,522) 2.743(0.9)(432,440) Fluorvesuvianite ! Ca19(Al,Mg)13[SiO4]10[Si2O7]4(F,OH)10 2.458(1) 2.512(0.7) 3.883(0.7) Forsterite Mg2SiO4 2.458(1)(020) 2.929(0.58)(211) 3.388(0.56)(011) Clinobarylite ! BaBe2Si2O7 2.4597(1) 1.4414(0.42) 1.5691(0.36) Hercynite Fe++Al2O4 2.46(1) 2.62(1) 2.95(1) Gaudefroyite Ca4Mn+++3-x(BO3)3(CO3)(O,OH)3 2.462(1) 2.707(0.9) 3.04(0.8) Hetaerolite ZnMn+++2O4 2.465(1) 2.135(0.37) 1.51(0.27) Cuprite Cu2O 2.47(1) 1.646(0.45) 2.85(0.4) Mcconnellite CuCrO2 2.47(1) 2.66(0.8) 3.02(0.7) Hydrohetaerolite Zn2Mn+++4O8·(H2O) 2.472(1) 2.26(0.9) 2.022(0.6) Oulankaite ! (Pd,Pt)5(Cu,Fe)4SnTe2S2 2.473(1) 2.84(0.8) 3.52(0.7) Satterlyite (Fe++,Mg)2(PO4)(OH) 2.476(1) 2.816(0.71) 2.602(0.56) Zincite (Zn,Mn)O 2.477(1)(202) 2.626(1)(112) 2.429(0.8)(300) Menshikovite ! Pd3Ni2As3 2.48(1) 2.69(1) 8(0.8) Northupite Na3Mg(CO3)2Cl 2.48(1) 4.02(1) 2.76(0.9) Chkalovite Na2BeSi2O6 2.489(1) 2.562(1) 4.72(1) Cornubite Cu5(AsO4)2(OH)4 2.49(1) 1.466(0.7) 1.593(0.6) Magnesiochromite MgCr2O4 2.49(1) 2.77(0.9) 1.544(0.8) Hausmannite Mn++Mn+++2O4 2.49(1) 3.336(1) 4.8(0.8) Parakhinite Cu++3PbTe++++++O4(OH)6 2.491(1) 3.451(0.9) 4.866(0.8) Khinite PbCu++3Te++++++O6(OH)2 2.492(1) 2.921(0.6) 1.46(0.45) Galaxite (Mn,Mg)(Al,Fe+++)2O4 2.494(1) 2.628(0.59) 2.89(0.5) Eucairite CuAgSe 2.5(1) 2.07(0.8) 2.93(0.6) Coulsonite Fe++V+++2O4 2.5(1) 2.95(0.9) 2.55(0.7) Furutobeite (Cu,Ag)6PbS4 2.501(1) 2.655(0.9) 2.893(0.8) Krinovite NaMg2CrSi3O10 2.501(1) 4.52(0.85) 14.2(0.8) Sudoite Mg2(Al,Fe+++)3Si3AlO10(OH)8 2.505(1) 2.648(0.8) 2.812(0.6) Hibonite (Ca,Ce)(Al,Ti,Mg)12O19 2.508(1) 1.512(0.4) 2.86(0.35) Delafossite Cu+Fe+++O2 2.51(1) 2.65(0.9) 2.57(0.8) Pirssonite Na2Ca(CO3)2·2(H2O) 2.51(1) 2.7(0.9) 5.42(0.8) Pinakiolite Mg2Mn+++O2(BO3) 2.51(1) 2.95(0.55) 1.472(0.5) Nichromite (Ni,Co,Fe++)(Cr,Fe+++,Al)2O4 2.51(1) 3.26(1) 2.81(0.6) Terlinguaite Hg+Hg++ClO 2.51(1) 6(0.55) 2.59(0.45) Rinneite K3NaFe++Cl6 2.512(1) 1.4721(0.45) 2.947(0.35) Cochromite (Co,Ni,Fe++)(Cr,Al)2O4 2.513(1) 1.476(0.4) 1.605(0.3) Trevorite NiFe+++2O4 2.513(1) 3.421(0.7) 5.92(0.6) Weinebeneite CaBe3(PO4)2(OH)2·5(H2O) 2.514(1) 2.548(1) 5.1(0.5) Bonaccordite Ni2Fe+++BO5 2.517(1) 1.479(0.6) 2.96(0.5) Cuprospinel (Cu,Mg)Fe+++2O4 2.518(1) 4.063(0.8) 2.983(0.6) Terlinguacreekite ! Hg++3O2Cl2 2.519(1) 2.954(0.5) 1.476(0.35) Zincochromite ZnCr2O4 2.52(1) 1.46(0.9) 1.6(0.9) Chromite Fe++Cr2O4 2.52(1) 1.582(0.9) 4.84(0.9) Magnesiocoulsonite MgV+++2O4 2.52(1) 2.32(0.96) 2.53(0.49) Tenorite CuO 2.52(1) 2.67(1) 2.98(1) Hydrohalite NaCl·2(H2O) 2.52(1) 2.96(1) 2.87(0.8) Natalyite Na(V+++,Cr+++)Si2O6 2.52(1) 3.1(1) 2.83(0.9) Homilite Ca2(Fe++,Mg)B2Si2O10 2.52(0.4) 3.41(0.4) 9.97(0.4) Montdorite (K,Na)(Fe++,Mn++,Mg)2.5[Si4O10](F,OH)2 2.52(1) 3.47(0.9) 2.78(0.8) Laihunite Fe++Fe+++2(SiO4)2 2.52(1) 5.76(1) 3.7(0.8) Painite CaZrB[Al9O18] 2.521(1) 3.9(0.85) 2.678(0.5) Brochantite Cu4(SO4)(OH)6 2.522(1)(112) 1.497(0.54)(220) 2.673(0.44)(103) Rinmanite ! (Zn,Mn)2Sb2Mg2Fe4O14(OH)2 2.522(1) 4.39(0.9) 3.203(0.8) Paragonite NaAl2(Si3Al)O10(OH)2 2.525(1) 2.96(0.4) 1.481(0.35) Magnesioferrite MgFe+++2O4 2.5293(1) 8.048(0.9) 2.0979(0.63) Hogtuvaite (Ca,Na)2(Fe++,Fe+++,Ti,Mg,Mn)6(Si,Be,Al)6O20 2.53(1) 1.483(0.85) 1.614(0.85) Magnetite Fe++Fe+++2O4 2.53(1) 1.486(0.6) 1.617(0.5) Qandilite (Mg,Fe++)2(Ti,Fe+++,Al)O4 2.53(1) 2.56(0.8) 2.9(0.8) Serendibite Ca2(Mg,Al)6(Si,Al,B)6O20 2.53(1) 2.676(0.77) 2.924(0.69) IMA2002-009a ! Ca2Fe++4Fe+++TiSi4BeAlO20 2.53(1) 2.75(0.8) 3.46(0.8) Xanthiosite Ni3(AsO4)2 2.53(1) 2.81(0.7) 4.86(0.6) Kuznetsovite ! Hg3Cl(AsO4) 2.53(1) 2.91(1) 3.73(0.8) Thalcusite TlCu3FeS4 2.53(1) 2.91(0.7) 7.324(0.7) Welshite Ca2Mg4(Mn,Fe)Sb+++++2O2[Si3Be2O18] 2.53(1) 3.16(1) 3.3(1) Odintsovite K2Na4Ca3Ti2Be4Si12O38 2.53(1)(-202) 4.5(0.89)(040) 3.16(0.72)(310,201) Potassicleakeite ! KNa2Mg2Fe+++2LiSi8O22(OH)2 2.53(1) 7.29(1) 3.61(0.8) Antigorite (Mg,Fe++)3Si2O5(OH)4 2.531(1) 2.422(0.8) 2.427(0.8) Clinosafflorite (Co,Fe,Ni)As2 2.5313(1) 2.8915(0.7) 4.139(0.5) Abhurite Sn3O(OH)2Cl2 2.532(1) 2.001(0.54) 2.618(0.5) Alumino-magnesiohulsite ! Mg2(Al,Mg,Sn)(BO3)O2 2.532(1) 2.774(0.8) 4.39(0.8) Reederite-(Y) ! Na15Y2(CO3)9(SO3F)Cl 2.533(1) 1.462(0.35) 2.72(0.35) Macaulayite (Fe+++,Al)24Si4O43(OH)2 2.535(1) 3.502(0.85) 7(0.85) Kellyite (Mn++,Mg,Al)3(Si,Al)2O5(OH)4 2.536(1) 2.714(0.87) 3.361(0.71) Fangite Tl3AsS4 2.54(1) 1.47(0.8) 2.23(0.5) Feroxyhyte Fe+++O(OH) 2.54(1) 1.484(0.9) 1.615(0.7) Brunogeierite (Ge++,Fe++)Fe+++2O4 2.54(1) 1.8(0.63) 5.9(0.63) Lawrencite (Fe++,Ni)Cl2 2.54(1) 2.65(0.85) 3.89(0.48) Radtkeite Hg3S2ClI 2.54(1) 2.816(1) 3.528(1) Junitoite CaZn2Si2O7·(H2O) 2.54(1) 3.51(0.9) 4.29(0.9) Triphylite LiFe++PO4 2.54(1) 4.67(0.9) 5.21(0.8) Nastrophite Na(Sr,Ba)(PO4)·9(H2O) 2.545(1) 2.325(0.9) 1.716(0.8) Gersdorffite NiAsS 2.545(1) 2.64(1) 2.935(0.8) Kullerudite NiSe2 2.545(1) 2.828(0.88) 3.188(0.85) Cobaltlotharmeyerite ! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 2.547(1) 1.486(0.9) 4.456(0.9) Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 2.547(1) 5.09(0.7) 5.75(0.7) Donharrisite Ni8Hg3S9 2.548(1) 3.051(0.9) 3.516(0.5) Lithiophilite LiMnPO4 2.549(1) 5.09(0.9) 5.89(0.9) Dumortierite Al6.5-7(BO3)(SiO4)3(O,OH)3 2.55(1) 1.499(0.8) 2.99(0.7) Franklinite (Zn,Mn++,Fe++)(Fe+++,Mn+++)2O4 2.55(1) 1.63(0.7) 1.5(0.6) Manganochromite (Mn,Fe++)(Cr,V)2O4 2.55(1) 2.61(1) 4.52(1) Beidellite Na0.5Al2(Si3.5Al0.5)O10(OH)2·n(H2O) 2.55(1) 2.69(0.8) 5.9(0.5) Chlormanganokalite K4MnCl6 2.55(1) 2.74(0.9) 2.8(0.8) Langbanite (Mn,Ca,Fe)++4(Mn+++,Fe+++)9Sb+++++Si2O24 2.55(1) 2.89(0.9) 2.6(0.8) Nierite Si3N4 2.55(1) 2.98(1) 1.955(0.9) Balkanite Cu9Ag5HgS8 2.55(1) 3.08(1) 3.48(0.9) Prehnite Ca2Al2Si3O10(OH)2 2.55(1) 3.39(0.46) 4.86(0.37) Schwertmannite Fe+++16O16(OH)12(SO4)2 2.55(1) 3.89(1) 2.81(0.8) Fiedlerite Pb3Cl4F(OH)2 2.55(1) 4.16(1) 12.3(1) Stilpnomelane K(Fe++,Mg,Fe+++)8(Si,Al)12(O,OH)27·n(H2O) 2.551(1) 3.43(0.8) 3.95(0.7) Olenite ! NaAl3Al6(BO3)3(Si6O18)(O,OH)4 2.552(1) 1.677(0.6) 1.723(0.5) Nelenite (Mn,Fe++)16Si12As+++3O36(OH)17 2.552(1) 2.476(0.9) 2.843(0.65) Rammelsbergite NiAs2 2.555(1) 2.035(0.8) 5.813(0.8) Paracostibite CoSbS 2.555(1)(-221,-312) 3.182(1)(-112) 2.718(0.8)(-311) Manganlotharmeyerite ! Ca(Mn+++,Mg,)2(AsO4)2(OH,H2O)2 2.556(1) 2.01(0.6) 2.823(0.5) Suanite Mg2B2O5 2.557(1) 3.175(0.9) 3.414(0.9) Lotharmeyerite CaZnMn+++(AsO3OH)4(OH)3 2.557(1) 6.81(0.45) 2.267(0.35) Rorisite (Ca,Mg)FCl 2.559(1) 1.502(0.8) 1.633(0.4) Vuorelainenite (Mn++,Fe++)(V+++,Cr+++)2O4 2.559(1) 2.521(0.95) 2.371(0.65) Pararammelsbergite NiAs2 2.559(1) 4.05(0.9) 12.2(0.8) Philipsburgite (Cu,Zn)6(AsO4,PO4)2(OH)6·(H2O) 2.56(1) 1.527(0.7) 1.662(0.6) Filipstadite (Mn++,Mg)4Sb+++++Fe+++O8 2.56(1) 1.912(0.8) 1.41(0.7) Gudmundite FeSbS 2.56(1) 2.22(0.9) 1.574(0.8) Niobocarbide ! (Nb,Ta)C 2.56(1) 2.66(1) 2.23(0.6) Naumannite Ag2Se 2.56(1) 2.86(0.85) 3.61(0.85) Tephroite Mn2SiO4 2.56(1) 3.21(0.7) 2.11(0.7) Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 2.56(1) 7.1(0.9) 3.548(0.6) Cronstedtite Fe++2Fe+++(SiFe+++)O5(OH)4 2.56(1) 7.16(0.7) 2.888(0.6) Mcgillite (Mn,Fe++)8Si6O15(OH)8Cl2 2.56(1) 7.17(0.9) 3.6(0.7) Friedelite Mn8Si6O15(OH,Cl)10 2.562(1) 4.96(0.7) 5.52(0.7) Shortite Na2Ca2(CO3)3 2.563(1) 1.503(0.4) 3.005(0.35) Jacobsite (Mn++,Fe++,Mg)(Fe+++,Mn+++)2O4 2.567(1)(051) 3.969(1)(220) 4.211(0.9)(211) Magnesiofoitite ! [ ](Mg2Al)Al6(Si6O18)(BO3)3(OH)4 2.569(1) 1.54(0.5) 2.873(0.4) Almandine Fe++3Al2(SiO4)3 2.57(1) 1.506(0.4) 3.016(0.4) Iwakiite Mn++(Fe+++,Mn+++)2O4 2.57(1) 4.176(0.38) 2.957(0.3) Yuanfuliite (Mg,Fe++)(Fe+++,Al,Mg,Ti,Fe++)(BO3)O 2.57(1) 5.07(0.8) 2.16(0.6) Azoproite (Mg,Fe++)2(Fe+++,Ti,Mg)BO5 2.571(1)(-202,131) 2.602(0.95)(130,-131) 1.504(0.91)(060,2.0.10) Ganterite ! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 2.571(1) 7.12(0.8) 3.559(0.8) Greenalite (Fe++,Fe+++)2-3Si2O5(OH)4 2.573(1) 3.452(0.91) 6.338(0.84) Foitite ! [ ]Na<0.5(Fe++,Al)3Al6Si6O18(BO3)3(OH)4 2.574(1) 1.509(0.45) 1.643(0.35) Ulvospinel TiFe++2O4 2.574(1) 2.729(0.9) 2.707(0.8) Maricite NaFe++PO4 2.574(1) 2.911(0.7) 4.21(0.6) Ardennite (Mn++,Ca,Mg)4(Al,Mg,Fe)6(SiO4)2(Si3O10)(AsO4,VO4)(OH)6 2.575(1) 5.15(0.3) 1.536(0.17) Vonsenite Fe++2Fe+++BO5 2.576(1) 2.961(0.85) 3.99(0.85) Dravite NaMg3Al6(BO3)3Si6O18(OH)4 2.576(1) 2.961(0.85) 3.99(0.85) Elbaite Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 2.576(1) 2.961(0.85) 3.99(0.85) Schorl NaFe++3Al6(BO3)3Si6O18(OH)4 2.578(1) 2.686(1) 1.435(0.9) Fluorocannilloite ! CaCa2(Mg4Al)Si5Al3O22F2 2.579(1) 2.557(0.9) 4.619(0.4) Nullaginite Ni2(CO3)(OH)2 2.58(1) 1.5(0.5) 1.6(0.5) Warwickite Mg(Ti,Fe+++,Al)(BO3)O 2.58(1) 2.108(0.56) 5.16(0.22) Sakhaite Ca3Mg(BO3)2(CO3)·0.36(H2O) 2.58(1) 2.93(1) 1.878(0.6) Sibirskite CaHBO3 2.58(1) 2.96(0.85) 3.99(0.85) Buergerite ! NaFe+++3Al6(BO3)3Si6O21F 2.58(1) 3.65(0.9) 3.11(0.51) Kenhsuite ! Hg3S2Cl2 2.58(1) 4.53(0.85) 3.64(0.8) Celadonite K(Mg,Fe++)(Fe+++,Al)[Si4O10](OH)2 2.581(1) 1.82(0.7) 3.66(0.5) Koashvite Na6(Ca,Mn)(Ti,Fe)Si6O18·(H2O) 2.582(1) 4.18(0.9) 2.531(0.7) Olympite LiNa5(PO4)2 2.584(1) 2.501(0.9) 2.927(0.9) Namansilite NaMn+++(Si2O6) 2.584(1) 5.558(0.86) 3.07(0.73) Mozartite CaMn+++SiO4(OH) 2.585(1) 2.23(0.9) 4.49(0.9) IMA2002-036 ! (Ba,Ca)2Al3(Si,Al)4O10(CO3)(OH)6·n(H2O) 2.585(1)(200) 2.985(0.8)(111) 1.828(0.6)(220) Keilite ! (Fe,Mg)S 2.586(1) 2.979(0.8) 4.24(0.6) Feruvite ! (Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(BO3)3Si6O18(OH)4 2.587(1) 3.68(0.7) 2.516(0.4) Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 2.588(1) 2.364(0.8) 1.546(0.6) Dzharkenite FeSe2 2.588(1)(13-1) 4.54(0.93)(020) 2.409(0.87)(13-2) Chromceladonite ! KCrMg(Si4O10)(OH)2 2.589(1) 2.609(0.7) 3.006(0.7) Remondite-(Ce) Na3(Ce,La,Ca,Na,Sr)3(CO3)5 2.59(1) 2.14(0.9) 2.71(0.9) Penzhinite (Ag,Cu)4Au(S,Se)4 2.59(1) 2.486(0.9) 5.16(0.8) Fredrikssonite Mg2(Mn+++,Fe+++)O2(BO3) 2.59(1) 2.49(0.85) 1.89(0.8) Ferroselite FeSe2 2.59(1) 3.29(1) 3(0.8) Crookesite Cu7(Tl,Ag)Se4 2.59(1) 3.92(1) 3.02(0.7) Fedorovskite Ca2(Mg,Mn)2B4O7(OH)6 2.59(1) 4.79(1) 9.54(1) Chalcophyllite Cu++18Al2(AsO4)3(SO4)3(OH)27·33(H2O) 2.592(1) 1.835(0.35) 2.193(0.35) Skutterudite (Co,Ni)As3-x 2.593(1) 1.746(0.8) 2.365(0.8) Krutovite NiAs2 2.596(1)(312) 2.121(0.9)(136) 3.04(0.8) Buryatite ! Ca3(Si,Fe+++,Al)[SO4][B(OH)4](OH,O)6·12(H2O) 2.596(1) 2.503(0.9) 1.908(0.8) Costibite CoSbS 2.596(1) 2.531(0.85) 5.192(0.65) Orthopinakiolite (Mg,Mn++)2Mn+++BO5 2.596(1) 3.181(0.72) 1.938(0.64) Seifertite ! SiO2 2.598(1) 2.866(0.9) 5.36(0.8) Nabaphite NaBaPO4·9(H2O) 2.598(1) 2.891(0.7) 4.337(0.6) Frankhawthorneite Cu2Te++++++O4(OH)2 2.598(1) 4.171(0.7) 3.349(0.6) Chantalite CaAl2SiO4(OH)4 2.598(1) 9.326(0.85) 3.418(0.8) Gerstmannite (Mg,Mn)2ZnSiO4(OH)2 2.6(1) 1.56(0.4) 1.61(0.3) Spessartine Mn++3Al2(SiO4)3 2.6(1) 1.816(0.8) 2.52(0.8) Kazakovite Na6Mn++TiSi6O18 2.6(1) 1.91(0.8) 2.07(0.8) Caswellsilverite NaCrS2 2.6(1) 2.17(0.9) 6.1(0.7) Pokrovskite Mg2(CO3)(OH)2·0.5(H2O) 2.6(1) 2.443(0.6) 7.29(0.5) Dioptase CuSiO2(OH)2 2.6(1) 3.09(0.5) 3.8(0.3) Tachyhydrite CaMg2Cl6·12(H2O) 2.601(1) 1.8388(0.6) 1.501(0.16) Niningerite (Mg,Fe++,Mn)S 2.601(1) 2.13(0.6) 3.01(0.5) Calcioburbankite Na3(Ca,REE,Sr)3(CO3)5 2.602(1) 1.757(0.8) 2.378(0.8) Jolliffeite (Ni,Co)AsSe 2.602(1) 2.469(0.25) 2.731(0.25) Eitelite Na2Mg(CO3)2 2.603(1) 4.128(0.8) 3.711(0.65) Wycheproofite NaAlZr(PO4)2(OH)2·(H2O) 2.604(1) 1.988(0.5) 2.083(0.25) Westerveldite (Fe,Ni,Co)As 2.6047(1) 5.243(0.45) 2.27206(0.4) Blatterite (Mn++,Mg)35Sb3(Mn+++,Fe+++)9(BO3)16O32 2.606(1) 2.07(0.7) 3.508(0.6) Mckinstryite (Ag,Cu)2S 2.606(1) 2.44(0.8) 2.383(0.75) Acanthite Ag2S 2.607(1) 5.22(0.5) 3.7(0.4) Petersenite-(Ce) (Na,Ca)4(Ce,La,Nd)2(CO3)5 2.608(1) 1.515(0.8) 1.3111(0.25) Lourenswalsite (K,Ba)2(Ti,Mg,Ca,Fe)4(Si,Al,Fe)6O14(OH)12 2.608(1)(241,143,125) 3.052(0.33)(140,214) 1.6652(0.3)(363,075) Tegengrenite ! (Mg,Mn++)2Sb+++++0.5(Mn+++,Si,Ti)0.5O4 2.61(1) 1.616(0.9) 1.841(0.9) Nickel-skutterudite (Ni,Co)As3-x 2.61(1) 1.84(0.9) 2.13(0.8) Harkerite Ca24Mg8Al2(SiO4)8(BO3)6(CO3)10·2(H2O) 2.61(1) 2.07(0.8) 3.33(0.8) Stromeyerite AgCuS 2.61(1) 2.33(0.9) 1.638(0.8) Lollingite FeAs2 2.61(1) 2.78(1) 3.78(1) Hanksite KNa22(SO4)9(CO3)2Cl 2.61(1) 2.88(1) 4.15(0.75) Tangeite CaCu(VO4)(OH) 2.61(1) 3.01(0.6) 1.587(0.5) Lavrentievite Hg3S2(Cl,Br)2 2.61(1) 3.14(0.4) 2.11(0.3) Chlorocalcite KCaCl3 2.61(1) 3.25(1) 4.08(1) Thorosteenstrupine (Ca,Th,Mn)3Si4O11F·6(H2O) 2.61(1) 9.77(1) 3.26(0.5) IMA2004-049 ! NaMg3(AlSi3)O10(OH)2 2.612(1) 1.847(0.5) 1.509(0.2) Alabandite MnS 2.613(1)(351) 5.705(1)(220) 3.048(0.9)(331) Potassic-carpholite ! (K,Na,[ ])(Li,Mn++)2Al)4Si4O12(OH)4(F,OH)4 2.614(1) 2.84(0.9) 4.02(0.8) Aminoffite Ca3Be2Si3O10(OH)2 2.616(1) 1.636(0.65) 3.509(0.61) Akimotoite ! (Mg,Fe)SiO3 2.616(1) 2.765(0.85) 2.414(0.49) Hawthorneite Ba[Ti3Cr4Fe4Mg]O19 2.619(1) 4.26(0.8) 3.36(0.7) Plumbonacrite Pb10(CO3)6O(OH)6 2.62(1)(051) 2.07(0.9)(152) 3.04(0.9)(410) Vanadiumdravite ! NaMg3V6(Si6O18)(BO3)3(OH)4 2.62(1) 2.91(1) 3.88(0.6) Kleinite Hg2N(Cl,SO4)·n(H2O) 2.62(1) 3.008(1) 2.104(0.6) Kornerupine (Mg,Fe++)4(Al,Fe+++)6(SiO4,BO4)5(O,OH)2 2.62(1) 3.03(0.6) 2.39(0.4) Coparsite ! Cu4O2[(As,V)O4]Cl 2.62(1) 3.04(0.75) 3.58(0.75) Chromdravite ! NaMg3(Cr,Fe+++)6(BO3)3Si6O18(OH)4 2.621(1) 2.39(0.7) 1.767(0.6) Willyamite (Co,Ni)SbS 2.622(1) 1.875(0.6) 1.959(0.6) Danielsite (Cu,Ag)14HgS8 2.623(1)(20-4,022,40-2,22 3.036(0.9)(112,211,31-1) 2.143(0.8)(014,410) Remondite-(La) ! Na3(La,Ce,Ca)3(CO3)5 2.623(1) 3.29(0.9) 3.61(0.9) Hydrocerussite Pb3(CO3)2(OH)2 2.624(1) 1.55(0.8) 2.726(0.7) Lawsonite CaAl2Si2O7(OH)2·(H2O) 2.624(1) 2.802(0.95) 2.612(0.9) Lindqvistite Pb2(Mn++,Mg)Fe+++16027 2.625(1) 2.679(0.9) 3.734(0.9) Brianite Na2CaMg(PO4)2 2.626(1) 3.02(0.86) 3.2(0.67) Panasqueiraite CaMg(PO4)(OH,F) 2.626(1) 3.151(0.9) 3.769(0.9) Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) 2.628(1)(110) 2.891(0.8)(105) 1.945(0.47)(205) Tuite ! Ca3(PO4)2 2.628(1) 4.9(0.74) 1.927(0.42) Portlandite Ca(OH)2 2.63(1) 1.622(0.9) 2.78(0.9) Yimengite K(Cr,Ti,Fe,Mg)12O19 2.63(1) 1.853(0.7) 3.33(0.6) Imandrite Na12Ca3Fe+++2Si12O36 2.63(1) 1.89(0.6) 2.82(0.6) Hellandite-(Y) (Ca,REE)4(Y,Ce)2(Al,[ ])2[Si4B4O22](OH)2 2.63(1) 2.77(1) 1.62(0.7) Magnetoplumbite Pb(Fe+++,Mn+++)12O19 2.63(1) 3.02(1) 3.19(1) Isokite CaMg(PO4)F 2.63(1) 3.12(1) 3.62(1) Garavellite FeSbBiS4 2.63(1) 3.68(1) 3.8(0.9) Loseyite (Mn,Zn)7(CO3)2(OH)10 2.63(1) 3.73(0.9) 5.29(0.8) Spertiniite Cu(OH)2 2.63(1) 4.05(0.9) 6.63(0.9) Povondraite ! (Na,K)(Fe+++,Fe++)3(Fe,Mg,Al)6(BO3)3Si6O18(OH)4 2.63(1) 4.81(1) 5.85(0.9) Libethenite Cu2(PO4)(OH) 2.631(1) 1.966(0.9) 1.77(0.8) Langisite (Co,Ni)As 2.631(1)(114) 2.799(0.8)(107) 1.478(0.7)(220) Batiferrite ! Ba(Ti2Fe+++8Fe++2)O19 2.634(1) 2.834(0.95) 3.486(0.8) Willemite Zn2SiO4 2.635(1) 3.965(1) 3.794(0.9) Lithiophosphate Li3PO4 2.637(1) 2.172(0.9) 3.13(0.7) IMA2004-013 ! (Ba,K)(Mg,Fe++,Ti)3(Si,Al)4O10O2 2.637(1) 2.801(1) 3.171(1) Austinite CaZn(AsO4)(OH) 2.639(1) 1.628(0.7) 2.791(0.7) Parsettensite (K,Na,Ca)(Mn,Al)7Si8O20(OH)8·2(H2O) (?) 2.639(1) 3.041(0.8) 5.28(0.7) Burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 2.64(1) 2.71(0.95) 5.42(0.7) Mitscherlichite K2CuCl4·2(H2O) 2.64(1) 2.939(1) 11.4(1) Raite Na3Mn3Ti0.25Si8O20(OH)2·10(H2O) 2.64(1) 3.31(1) 5.28(1) Iraqite-(La) K(La,Ce,Th)2(Ca,Na)4(Si,Al)16O40 2.64(1) 3.51(1) 2.57(0.5) Kupletskite K2Na(Mn,Fe++)7(Ti,Nb)2Si8O26(OH)4F 2.641(1) 2.795(0.9) 1.634(0.47) Haggertyite ! Ba[Fe++6Ti5Mg]O19 2.643(1) 2.372(0.8) 1.42(0.7) Urvantsevite Pd(Bi,Pb)2 2.644(1) 3.61(0.9) 3.76(0.9) Tocornalite (Ag,Hg)I (?) 2.644(1) 4.31(1) 3.38(0.8) Montroseite (V+++,Fe+++,V++++)O(OH) 2.647(1) 1.847(0.8) 2.6(0.8) Oosterboschite (Pd,Cu)7Se3 2.647(1) 3.071(0.8) 4.892(0.55) Trona Na3(CO3)(HCO3)·2(H2O) 2.648(1) 2.969(0.7) 2.419(0.6) Peterbaylissite Hg+3(CO3)(OH)·2(H2O) 2.649(1) 2.787(1) 3.07(0.9) Hatrurite Ca3SiO5 2.649(1) 3.054(0.45) 3.049(0.4) Nacaphite Na(Na,Ca)2(PO4)F 2.65(1) 1.58(0.9) 2.96(0.8) Grossular Ca3Al2(SiO4)3 2.65(1) 1.72(0.4) 2.11(0.4) Bafertisite Ba(Fe++,Mn)2TiSi2O7(O,OH)2 2.65(1) 1.913(0.55) 4.97(0.3) Tadzhikite-(Ce) Ca4(Ce,Y)2(Ti,Al,Fe+++,[ ])2[Si4B4O22](OH)2 2.65(1) 1.913(0.55) 4.97(0.3) Tadzhikite-(Y) ! Ca4(Y,Ce)2(Ti,Al,Fe+++,[ ])2[Si4B4O22](OH)2 2.65(1) 2.16(0.9) 2.25(0.5) Polarite Pd(Bi,Pb) 2.65(1) 2.16(0.9) 2.5(0.6) Borishanskiite Pd1+x(As,Pb)2, x = 0-0.2 2.65(0.5) 2.74(0.4) 4.64(0.3) Bayankhanite * Cu6HgS4 2.65(1) 2.78(0.5) 7.19(0.5) Brownmillerite Ca2(Al,Fe+++)2O5 2.65(1) 3.02(0.6) 3.95(0.6) Grechishchevite Hg3S2(Br,Cl,I)2 2.65(1) 3.06(0.6) 3.07(0.6) Arzakite Hg3S2(Br,Cl)2 2.65(1) 3.69(0.9) 2.9(0.8) Clerite ! MnSb2S4 2.651(1)(13-1,200) 2.176(0.4)(13-3,202) 2.181(0.4) Ferrokinoshitalite ! (Ba,K)(Fe++,Mg)3(Si2Al2)O10 (OH,F)2 2.651(1)(400,22-2) 3.27(0.92)(221,112,130) 2.58(0.91)(222,040) Kapustinite ! Na5.5Mn0.25ZrSi6O16(OH)2 2.651(1) 4.38(0.6) 4.965(0.6) Manganostibite (Mn++,Fe++)7(SbO4)(AsO4,SiO4)O4 2.652(1) 2.635(0.73) 2.855(0.56) Hellandite-(Ce) ! (Ca3REE)4Ce2Al[ ]2[Si4 B4O22](OH)2 2.654(1) 2.967(0.85) 3.146(0.85) IMA2002-034 ! CdSO4·4(H2O) 2.655(1) 2.862(0.56) 3.479(0.4) Okayamalite ! Ca2B2SiO7 2.655(1) 2.999(1) 3.303(0.9) Strakhovite NaBa3(Mn++,Mn+++)4Si6O19(OH)3 2.655(1) 8.06(0.8) 3.3(0.6) Wattersite Hg+4Hg++Cr++++++O6 2.656(1) 3.11(1) 5.3(1) Berborite Be2(BO3)(OH,F)·(H2O) 2.657(1) 2.446(0.8) 7.5633(0.8) Zinalsite Zn2AlSi2O5(OH)4·2(H2O) (?) 2.657(1) 2.607(0.8) 3.304(0.7) Combeite Na2Ca2Si3O9 2.658(1) 2.778(1) 2.887(0.84) Barentsite Na7AlH2(CO3)4F4 2.66(1) 1.78(0.4) 2.41(0.4) Ullmannite NiSbS 2.66(1) 1.961(0.9) 1.811(0.8) Nickeline NiAs 2.66(1) 2.61(0.75) 3.29(0.4) Gregoryite (Na2,K2,Ca)CO3 2.66(1) 2.8(0.7) 1.94(0.4) Nagelschmidtite Ca7(SiO4)3(PO4)2 2.66(1) 3.08(0.62) 2.19(0.55) Khanneshite (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5 2.66(1) 3.14(1) 4.12(1) Garronite Na2Ca5Al12Si20O64·27(H2O) 2.66(1) 3.32(1) 2.57(0.8) Bradleyite Na3Mg(PO4)(CO3) 2.662(1) 1.845(0.7) 1.652(0.6) Manganarsite Mn++3As+++204(OH)4 2.662(1) 2.035(0.8) 2.29(0.8) Fischesserite Ag3AuSe2 2.662(1) 2.677(1) 2.418(0.95) Arsenopyrite FeAsS 2.662(1) 2.836(0.9) 1.572(0.5) Tomichite (V,Fe)4Ti3AsO13(OH) 2.662(1) 4.386(1) 4.733(1) Flinkite Mn++2Mn+++(AsO4)(OH)4 2.663(1) 1.687(0.8) 3.18(0.8) Zenzenite Pb3(Fe+++,Mn+++)4Mn++++3O15 2.663(1) 2.73(1) 2.259(0.8) Bredigite Ca7Mg(SiO4)4 2.664(1) 2.129(0.85) 2.122(0.16) Nanpingite Cs(Al,Mg,Fe++,Li)2(Si3Al)O10(OH,F)2 2.664(1) 2.585(0.7) 5.35(0.7) Hulsite (Fe++,Mg)2(Fe+++,Sn)O2(BO3) 2.664(1) 3.637(0.6) 3.762(0.6) Capgaronnite HgAg(Cl,Br,I)S 2.666(1)(440) 1.54(0.5)(844) 2.901(0.4)(511) Rondorfite ! Ca8Mg(SiO4)4Cl2 2.666(1) 2.586(0.4) 3.637(0.4) Monticellite CaMgSiO4 2.666(1) 3.057(0.95) 6.32(0.95) Oxammite (NH4)2(C2O4)·(H2O) 2.666(1) 4.26(0.75) 5.06(0.66) 2.669(1) 2.878(0.8) 5.68(0.7) Comancheite Hg13(Cl,Br)8O9 2.669(1) 3.214(0.53) 5.333(0.37) Ellisite Tl3AsS3 2.669(1) 3.91(0.6) 1.788(0.5) Jarosewichite Mn++3Mn+++(AsO4)(OH)6 2.67(1) 2.42(0.9) 8.18(0.7) Natrophosphate Na7(PO4)2F·19(H2O) 2.67(1) 2.64(0.9) 6.71(0.6) Natrofairchildite Na2Ca(CO3)2 2.67(1) 2.7(1) 3.12(1) Harmotome (Ba,Na,K)1-2(Si,Al)8O16·6(H2O) 2.67(1) 3.25(0.6) 3.12(0.5) Ilimaussite-(Ce) (Ba,Na)10K3Na4.5Ce5(Nb,Ti)6[Si12O36][Si9O18(O,OH)24]O6 2.671(1) 1.89(0.63) 3.087(0.29) Carobbiite KF 2.673(1) 2.96(1) 4.81(0.9) Clinotyrolite Ca2Cu9[(As,S)O4]4(OH)10·10(H2O) 2.674(1) 2.693(1) 6.15(0.6) Ferrowyllieite (Na,Ca,Mn)(Fe++,Mn)(Fe++,Fe+++,Mg)Al(PO4)3 2.674(1) 2.693(1) 6.15(0.6) Rosemaryite (Na,Ca,Mn++)(Mn++,Fe++)(Fe+++,Fe++,Mg)Al(PO4)3 2.674(1) 2.693(1) 6.15(0.6) Wyllieite (Na,Ca,Mn++)(Mn++,Fe++)(Fe++,Fe+++,Mg)Al(PO4)3 2.674(1) 3.773(0.9) 8.036(0.85) Abenakiite-(Ce) Na26REE6(SiO3)6(PO4)6(CO3)6(S++++O2)O 2.674(1) 4.187(0.76) 2.459(0.4) Tychite Na6Mg2(CO3)4(SO4) 2.675(1) 2.883(0.9) 3.96(0.7) Imhofite Tl6CuAs16S40 2.675(1) 3.002(0.66) 8.11(0.56) Fluoro-sodic-pedrizite ! NaLi2(Mg2Al2Li)S5Si8O22F2 2.675(1) 7.13(0.8) 3.564(0.6) Ferropyrosmalite (Fe++,Mn)8Si6O15(OH,Cl)10 2.676(1)(121) 2.63(0.64)(-122) 1.92(0.36)(-123) Jagueite ! Cu2Pd3Se4 2.676(1) 3.23(0.6) 9.8(0.6) Johninnesite Na2Mg4Mn++12(AsO4)2(Si12O35)(OH)6 2.676(1) 3.69(1) 7.381(1) Srebrodolskite Ca2Fe+++2O5 2.677(1) 2.693(0.75) 3.45(0.65) Ferrorosemaryite ! [ ]NaFe++Fe+++Al(PO4)3 2.68(1) 2.08(0.4) 5.9(0.32) Molysite Fe+++Cl3 2.68(1) 2.9(1) 2.69(0.7) Epidote Ca2(Fe+++,Al)3(SiO4)3(OH) = Ca2(Fe,Al)Al2(SiO4)(Si2O7)O(OH) 2.68(1) 3.31(0.85) 4.26(0.85) Itoigawaite ! SrAl2Si2O7(OH)2·(H2O) 2.68(1) 4.18(0.9) 2.47(0.8) Ferrotychite Na6Fe++2(SO4)(CO3)4 2.68(1) 4.76(0.81) 2.656(0.5) Reppiaite Mn++5[(V,As)O4]2(OH)4 2.68(1) 4.89(0.95) 2.45(0.5) Mayenite Ca12Al14O33 2.681(1) 2.846(0.8) 1.5825(0.5) Graeserite ! (Fe+++,Ti)4Ti3AsO13(OH) 2.684(1) 2.999(0.7) 1.603(0.6) Uvarovite Ca3Cr2(SiO4)3 2.685(1) 3.472(0.9) 2.512(0.9) Qingheiite Na2(Mn++,Mg,Fe++)(Al,Fe+++)(PO4)3 2.686(1) 2.593(0.75) 3.42(0.6) Hagendorfite NaCaMn(Fe++,Fe+++,Mg)2(PO4)3 2.686(1)(420) 3.003(0.42)(400) 2.452(0.39)(422) Wadalite Ca6Al5Si2O16Cl3 2.6865(1) 2.6712(0.65) 2.653(0.47) Merwinite Ca3Mg(SiO4)2 2.687(1)(151) 10.65(0.6)(110) 3.079(0.55)(310) Nyboite NaNa2(Mg3Al2)Si7AlO22(OH)2 2.688(1)