General Richterite Information![]() Na(CaNa)(Mg,Fe++)5[Si8O22](OH)2 |
![]() Molecular Weight = 881.35 gm |
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Sodium 5.22 % Na 7.03 % Na2O |
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Calcium 4.55 % Ca 6.36 % CaO |
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Magnesium 8.27 % Mg 13.72 % MgO |
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Iron 12.67 % Fe 16.30 % FeO |
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Silicon 25.49 % Si 54.54 % SiO2 |
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Hydrogen 0.23 % H 2.04 % H2O |
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Oxygen 43.57 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
![]() Na2CaMg3Fe2+2(Si8O22)(OH)2 |
![]() Valid Species (Pre-IMA) 1865 |
![]() Link to MinDat.org Location Data. |
![]() Named as per current IMA amphibole nomenclature (Burke and Leake 2004; Can. Mineral., 42, 1881-1883). |
![]() Richterite + Pronunciation |
![]() ![]() ICSD 72080 |
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PDF 25-808 |
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Richterite Crystallography![]() a:b:c =0.5446:1:0.2842 |
![]() a = 10.03, b = 18.415, c = 5.234, Z = 2; beta = 104.97° V = 933.92 Den(Calc)= 3.13 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
![]() By Intensity(I/Io): 3.186(1), 3.301(0.75), 8.56(0.75), |
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| Physical Properties of Richterite![]() {110} Perfect, {100} Perfect |
![]() Blue, Brown, Brown red, Gray violet, Yellow. |
![]() 3.09 |
![]() Transparent to translucent |
![]() Brittle - Uneven - Very brittle fracture producing uneven fragments. |
![]() Tabular - Form dimensions are thin in one direction. |
![]() 6 - Orthoclase |
![]() Vitreous (Glassy) |
![]() white |
| Optical Properties of Richterite![]() CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2002,KPDmeas= 0.2028,KC= 0.2052 Ncalc = 1.63 - 1.64 ![]() Biaxial (-), a=1.615, b=1.629, g=1.636, bire=0.0210, 2V(Calc)=70, 2V(Meas)=68. |
| Calculated Properties of Richterite![]() Bulk Density (Electron Density)=3.06 gm/cc |
note: Specific Gravity of Richterite =3.09 gm/cc. ![]() Fermion Index = 0.02 |
Boson Index = 0.98 ![]() PERichterite = 5.54 barns/electron |
U=PERichterite x rElectron Density= 16.93 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Richterite is Not Radioactive | Richterite Classification![]() 66.01.03b.09 (66)Inosilicate Double-Width Unbranched Chains, W=2 |
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(66.01)with P=2 amphibole configuration |
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(66.01.03b)Group 3, the sodic-calcic amphiboles |
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![]() 09.DE.20 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family |
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| Other Richterite Information![]() PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) |
![]() Links to other databases for Richterite : |
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 - Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Athena 6 - EUROmin Project 7 - Ecole des Mines de Paris 8 - Franklin Minerals(Dunn) 9 - GeoScienceWorld 10 - Google Images 11 - Google Scholar 12 - Handbook of Mineralogy (MinSocAm) 13 - Handbook of Mineralogy (UofA) 14 - MinDAT 15 - Mineralienatlas (Deutsch) 16 - Online Mineral Museum 17 - QUT Mineral Atlas 18 - Ruff.Info 19 - Scandinavian mineral gallery 20 - WWW-MINCRYST Search for Richterite using: Visit our Advertisers for Richterite : A Bijoux Google Search for RichteriteAdam's Minerals Google Search for Richterite Cape Minerals Google Search for Richterite Dakota Matrix Minerals Google Search for Richterite Excalibur Mineral Corp. Google Search for Richterite Exceptional Minerals Google Search for Richterite John Betts Fine Minerals Search for Richterite McDougall Minerals Google Search for Richterite Mineral News Website Link Rock and Mineral Shows Google Search for Richterite Weinrich Minerals, Inc. Google Search for Richterite Ask about Richterite here : Print or Cut-and-Paste your Richterite Specimen Label here :
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