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Petrovskaite Mineral Data
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General Petrovskaite Information
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 Chemical Formula: |
AuAg(S,Se) |
| Composition: |
Molecular Weight = 339.25 gm |
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Silver 31.80 % Ag |
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Gold 58.06 % Au |
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Selenium 1.16 % Se |
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Sulfur 8.98 % S |
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______ |
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100.00 % |
| Empirical Formula: |
AuAgSe0.05S0.95 |
| Environment: |
Microscopic rims on gold particles. |
| IMA Status: |
Approved IMA 1984 |
| Locality: |
Maikain gold deposit, Kazakhstan. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Nina Petrovskaya (1910-), Russian mineralogist. |
| Name Pronunciation: |
Petrovskaite + Pronunciation  |
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Petrovskaite Crystallography
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| Axial Ratios: |
a:b:c =0.741:1:1.0826 |
| Cell Dimensions: |
a = 4.943, b = 6.67, c = 7.221, Z = 4; beta = 95.68° V = 236.91 Den(Calc)= 9.51 |
| Crystal System: |
Monoclinic Space Group: P 2/m,P 2,Pm |
| X Ray Diffraction: |
By Intensity(I/Io): 2.77(1), 2.63(0.5), 2.39(0.4), |
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Physical Properties of Petrovskaite
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| Color: |
Lead gray, Dark grayish black, Black. |
| Density: |
9.5 |
| Diaphaneity: |
Opaque |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
2-2.5 - Gypsum-Finger Nail |
| Luster: |
Metallic - Dull |
| Streak: |
dark gray |
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Optical Properties of Petrovskaite
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| Optical Data: |
NCalc= 2.42 - from Gladstone-Dale relationship (KC = 0.1492) where Ncalc=Dcalc*KC+1
NCalc= 2.42 - from Gladstone-Dale relationship (KC = 0.1492) where Ncalc=Dmeas*KC+1
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Calculated Properties of Petrovskaite
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| Electron Density: |
Bulk Density (Electron Density)=8.01 gm/cc
note: Specific Gravity of Petrovskaite =9.51 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0015579229
Boson Index = 0.9984420771 |
| Photoelectric: |
PEPetrovskaite =1,025.10 barns/electron
U=PEPetrovskaite x rElectron Density=8,212.89 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Petrovskaite is Not Radioactive |
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Petrovskaite Classification
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| Dana Class: |
02.04.17.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.04)where Am Bn Xp, with (m+n):p=2:1 |
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(02.04.17)Dana Group |
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02.04.17.01 Petrovskaite AuAg(S,Se) P 2/m,P 2,Pm Mono |
| Strunz Class: |
02.BA.40c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1) |
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02.BA -With Cu, Ag, Au |
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02.BA.40c Petrovskaite AuAg(S,Se) P 2/m,P 2,Pm Mono |
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Other Petrovskaite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) |
| See Also: |
Links to other databases for Petrovskaite :
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
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Print or Cut-and-Paste your Petrovskaite Specimen Label here :
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Petrovskaite
AuAg(S,Se)
Dana No: 02.04.17.01 Strunz No: 02.BA.40c
Locality:
Notes:
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