Eveslogite Mineral Data


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General Eveslogite Information
Help on Chemical Formula: Chemical Formula: (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14
Help on Composition: Composition: Molecular Weight = 6,800.28 gm
   Potassium   7.05 %  K     8.50 % K2O
   Rubidium    0.18 %  Rb    0.19 % Rb2O
   Barium      2.52 %  Ba    2.82 % BaO
   Sodium      3.48 %  Na    4.69 % Na2O
   Strontium   2.32 %  Sr    2.74 % SrO
   Calcium    13.24 %  Ca   18.52 % CaO
   Zirconium   0.25 %  Zr    0.34 % ZrO2
   Tantalum    0.21 %  Ta    0.26 % Ta2O5
   Titanium    3.89 %  Ti    6.50 % TiO2
   Manganese   0.77 %  Mn    1.10 % Mn2O3
   Niobium     4.56 %  Nb    6.53 % Nb2O5
   Aluminum    0.16 %  Al    0.31 % Al2O3
   Iron        0.85 %  Fe    0.88 % FeO /  0.23 % Fe2O3
   Silicon    19.54 %  Si   41.79 % SiO2
   Hydrogen    0.32 %  H     2.84 % H2O
   Chlorine    0.42 %  Cl    0.42 % Cl
                -   %  Cl   -0.09 % -O=Cl2
   Oxygen     37.53 %  O
   Fluorine    2.71 %  F     2.71 % F
                -   %  F    -1.14 % -O=F2
             ______        ______ 
             100.00 %      100.14 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca22.46K12.27Na10.3Sr1.8Ba1.25Ti5.53Nb3.34Mn3+0.95Fe2+0.83Fe3+0.2Zr0.19Rb0.14Ta0.08 (OH)12Si47.3Al0.41O138.08(OH)9.42Cl0.8
Help on Environment: Environment: Veins cutting nephneline syenite. (close to astrophyllite)
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Mt. Eveslogchorr, Khibiny alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality
Help on Synonym: Synonym: IMA2001-023
 

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Eveslogite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5641:1:1.7768
Help on Cell Dimensions: Cell Dimensions: a = 14.069, b = 24.937, c = 44.31, Z = 4; beta = 95.02° V = 15,486.03 Den(Calc)= 2.92
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.853(1)(428), 3.127(0.65)(426), 2.99(0.59)(2.3.12),3.11(0.52)(364), 12.33(0.51)(020), 2.94(0.45)(24.1.2), 6.199(0.42)(040),
 

Physical Properties of Eveslogite

Help on Cleavage: Cleavage: [001] Perfect, [010] Perfect
Help on Color: Color: Light brown, Yellow brown.
Help on Density: Density: 2.85
Help on Diaphaniety: Diaphaniety: Semitransparent
Help on Fracture: Fracture: Brittle - Splintery - Brittle fracture leaving splintery fragments.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white
 

Optical Properties of Eveslogite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.019 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2191,KPDmeas= 0.2244,KC= 0.2203
Help on Optical Data: Optical Data: Biaxial (-), a=1.631, b=1.641, g=1.647, bire=0.0160
 

Calculated Properties of Eveslogite

Help on Electron Density: Electron Density:

relectron=2.86 gm/cc
note: rEveslogite =2.92 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.02111
Boson Index = 0.97889
Help on Photoelectric: Photoelectric:

PEEveslogite = 26.49 barns/electron
U=PEEveslogite x relectron= 75.71 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 172.67 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Eveslogite - barely detectable

 

Eveslogite Classification
Help on Dana Class: Dana Class: 56.2.6c.7 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.2)with cations in [4] and/or >[4] coordination
  (56.2.6c)Seidozerite - Lamprophyllite group (Lamprophyllite subgroup)
 
56.2.6c.1 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m
 
56.2.6c.2 Delindeite Ba2(Na,K,[])3(Ti,Fe)[Ti2(O,OH)4Si4O14](H2O,OH)2 A2/m 2/m
 
56.2.6c.3 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m
 
56.2.6c.4 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m
 
56.2.6c.5 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m
 
56.2.6c.6 Andremeyerite BaFe(Fe,Mn,Mg)Si2O7 P 21/c 2/m
 
56.2.6c.7 Eveslogite ! (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14 P 2/m 2/m
 
56.2.6c.8 Nabalamprophyllite! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m
Help on Strunz Class: Strunz Class: VIII/F.35-60 VIII - Silicates
  VIII/F - Inosilicates (chain and band) complex chain structure. Cylindric chains and others
  VIII/F.35 - Ashcroftine-(Y) series
 
VIII/F.35-10 Canasite (Na,K)6Ca5Si12O30(OH,F)4 C 2/m 2/m
 
VIII/F.35-20 Frankamenite! K3Na3Ca5(Si12O30)[F,(OH)]4·(H2O) P1 1
 
VIII/F.35-30 Miserite K(Ca,Ce)5[Si8O22](OH,F)2 P1 1
 
VIII/F.35-40 Yuksporite (Sr,Ba)2K4(Ca,Na)14([],Mn,Fe){(Ti,Nb)4(O,OH)4[Si6O17]2[Si2O7]3}(H2O,OH)n,n~3 P 21/m 2/m
 
VIII/F.35-50 Charoite K5Ca8(Si6O15)2(Si2O7)Si4O9(OH)·3(H2O) P*/4 ((pseudo Ortho) 2/m
 
VIII/F.35-60 Eveslogite (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14 P 2/m 2/m
 

Other Eveslogite Information
Help on References: References: NAME( AmMin, 89:249) PHYS. PROP.(AmMin, 89:249) OPTIC PROP.(AmMin, 89:249)
Help on See Also: See Also: Links to other databases for Eveslogite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Eveslogite

(Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14
Dana No: 56.2.6c.7 Strunz No: VIII/F.35-60
Locality:

 

Notes:

 
 
   
 
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