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General Thorikosite Information |
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 Chemical Formula: |
Pb3(Sb+++,As+++)O3(OH)Cl2 | ||
| Composition: |
Molecular Weight = 867.55 gm | ||
| Antimony 10.53 % Sb 12.60 % Sb2O3 | |||
| Arsenic 2.16 % As 2.85 % As2O3 | |||
| Hydrogen 0.12 % H 1.04 % H2O | |||
| Lead 71.65 % Pb 77.18 % PbO | |||
| Chlorine 8.17 % Cl 8.17 % Cl | |||
| - % Cl -1.84 % -O=Cl2 | |||
| Oxygen 7.38 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Pb3(SbO3)0.75(AsO3)0.25(OH)Cl2 | ||
| Environment: |
Sea water altered metallugical slags. | ||
| IMA Status: |
Approved IMA 1985 | ||
| Locality: |
Thorikos, near the Laurium mines. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Name Pronunciation: |
Thorikosite + Pronunciation  |
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| Synonym: |
ICSD 62160 | ||
| PDF 38-403 | |||
Thorikosite Image | |||
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Images:
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Thorikosite Crystallography |
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| Axial Ratios: |
a:c = 1:3.27991 | ||
| Cell Dimensions: |
a = 3.919, c = 12.854, Z = 1; V = 197.42 Den(Calc)= 7.30 | ||
| Crystal System: |
Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.891(1), 3.754(0.7), 2.775(0.5), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Thorikosite |
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| Cleavage: |
{001} Perfect | ||
| Color: |
Light yellow. | ||
| Density: |
7.24 | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | ||
| Hardness: |
3 - Calcite | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Thorikosite |
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| Optical Data: |
NCalc= 2.2 - from Gladstone-Dale relationship (KC = 0.1643) where Ncalc=Dcalc*KC+1 NCalc= 2.19 - from Gladstone-Dale relationship (KC = 0.1643) where Ncalc=Dmeas*KC+1 |
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Calculated Properties of Thorikosite |
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| Electron Density: |
Bulk Density (Electron Density)=6.05 gm/cc note: Specific Gravity of Thorikosite =7.30 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.15 Boson Index = 0.85 |
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| Photoelectric: |
PEThorikosite =1,366.80 barns/electron U=PEThorikosite x rElectron Density=8,269.13 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Thorikosite is Not Radioactive |
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Thorikosite Classification |
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| Dana Class: |
10.02.06.01 (10)Oxyhalides and Hydroxyhalides | ||
| (10.02)where A (O,OH) Xq | |||
| (10.02.06)Dana Group | |||
| Strunz Class: |
03.DC.40 03 - HALIDES | ||
| 03.D - Oxyhalides, Hydroxyhalides and Related Double Halides | |||
| 03.DC -With Pb (As,Sb,Bi), without Cu | |||
Other Thorikosite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Thorikosite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - WWW-MINCRYST Search for Thorikosite using: Visit our Advertisers for Thorikosite : A Bijoux Google Search for ThorikositeAdam's Minerals Google Search for Thorikosite Cape Minerals Google Search for Thorikosite Dakota Matrix Minerals Google Search for Thorikosite Excalibur Mineral Corp. Google Search for Thorikosite Exceptional Minerals Google Search for Thorikosite John Betts Fine Minerals Search for Thorikosite McDougall Minerals Google Search for Thorikosite Mineral News Website Link Rock and Mineral Shows Google Search for Thorikosite Weinrich Minerals, Inc. Google Search for Thorikosite Ask about Thorikosite here : Print or Cut-and-Paste your Thorikosite Specimen Label here :
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