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General Roshchinite Information |
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 Chemical Formula: |
Ag19Pb10Sb51S96 or Pb(Ag,Cu)2(Sb,As)5S10 | ||
| Composition: |
Molecular Weight = 12887.63 gm | ||
| Copper 0.99 % Cu | |||
| Silver 15.90 % Ag | |||
| Antimony 43.46 % Sb | |||
| Arsenic 2.91 % As | |||
| Lead 12.86 % Pb | |||
| Sulfur 23.89 % S | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
Ag19Pb8Cu2Sb46As5S96 | ||
| IMA Status: |
Approved IMA 1990 | ||
| Locality: |
Kvartsitovyye Gorki deposit, Kasakhstan. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Yuri V. Roshchin (1934-1979), Russian Geologist. | ||
| Name Pronunciation: |
Roshchinite + Pronunciation  |
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| Synonym: |
IMA1989-006 | ||
Search for Roshchinite Images | |||
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Images:
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Roshchinite Crystallography |
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| Axial Ratios: |
a:b:c =0.6796:1:0.8889 | ||
| Cell Dimensions: |
a = 12.946, b = 19.048, c = 16.932, Z = 1; V = 4,175.35 Den(Calc)= 5.13 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmna | ||
| X Ray Diffraction: |
By Intensity(I/Io): 1.765(1), 2.85(0.8), 3.24(0.6), | ||
Physical Properties of Roshchinite |
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| Cleavage: |
None | ||
| Color: |
Lead gray, Silver gray. | ||
| Density: |
5.27 | ||
| Diaphaneity: |
Opaque | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | ||
| Hardness: |
2.5-3.5 - Finger Nail-Copper Penny | ||
| Luster: |
Metallic | ||
| Streak: |
pale steel gray | ||
Optical Properties of Roshchinite |
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| RL Anisotrophism: |
Distinct. | ||
Calculated Properties of Roshchinite |
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| Electron Density: |
Bulk Density (Electron Density)=4.50 gm/cc note: Specific Gravity of Roshchinite =5.13 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.03 Boson Index = 0.97 |
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| Photoelectric: |
PERoshchinite = 416.00 barns/electron U=PERoshchinite x rElectron Density=1,872.51 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Roshchinite is Not Radioactive |
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Roshchinite Classification |
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| Dana Class: |
03.04.15.07 (03)Sulfides - Sulfosalts | ||
| (03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals | |||
| (03.04.15)Lillianite Group (Orthorhombic, AmBnS6 where A=Pb, Ag, Mn and B=Sb, Bi) | |||
| Strunz Class: |
02.JB.40a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf | ||
| 02.J - Sulfosalts of PbS Archetype | |||
| 02.JB -Galena derivatives, with Pb | |||
Other Roshchinite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.77,p450,1992) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Roshchinite : 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 Search for Roshchinite using: Visit our Advertisers for Roshchinite : A Bijoux Google Search for RoshchiniteAdam's Minerals Google Search for Roshchinite Cape Minerals Google Search for Roshchinite Dakota Matrix Minerals Google Search for Roshchinite Excalibur Mineral Corp. Google Search for Roshchinite Exceptional Minerals Google Search for Roshchinite John Betts Fine Minerals Search for Roshchinite McDougall Minerals Google Search for Roshchinite Mineral News Website Link Rock and Mineral Shows Google Search for Roshchinite Weinrich Minerals, Inc. Google Search for Roshchinite Ask about Roshchinite here : Print or Cut-and-Paste your Roshchinite Specimen Label here :
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