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Penzhinite Mineral Data
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General Penzhinite Information
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 Chemical Formula: |
(Ag,Cu)4Au(S,Se)4 |
| Composition: |
Molecular Weight = 759.28 gm |
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Copper 8.37 % Cu |
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Silver 42.62 % Ag |
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Gold 25.94 % Au |
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Selenium 10.40 % Se |
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Sulfur 12.67 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Ag3CuAuS3Se |
| Environment: |
In a near surface Au-Ag deposit. |
| IMA Status: |
Approved IMA 1984 |
| Locality: |
Penzhina River, near the Kamchatka Peninsula, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Penzhinite + Pronunciation  |
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Penzhinite Crystallography
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| Axial Ratios: |
a:c = 1:1.2323 |
| Cell Dimensions: |
a = 13.779, c = 16.98, Z = 18; V = 2,791.93 Den(Calc)= 8.13 |
| Crystal System: |
Hexagonal - Trapezohedral H-M Symbol (6 2 2) Space Group: P 6322 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.59(1), 2.14(0.9), 2.71(0.9), |
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Physical Properties of Penzhinite
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| Color: |
Gray white, Steel gray. |
| Diaphaneity: |
Opaque |
| Luster: |
Metallic |
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Optical Properties of Penzhinite
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| Optical Data: |
NCalc= 2.1 - from Gladstone-Dale relationship (KC = 0.1358) where Ncalc=Dcalc*KC+1
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| RL Anisotrophism: |
Evident, in colors of creamy yellow and greenish gray. |
| RL Color: |
Grayish white. |
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Calculated Properties of Penzhinite
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| Electron Density: |
Bulk Density (Electron Density)=7.09 gm/cc
note: Specific Gravity of Penzhinite =8.13 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0088537668
Boson Index = 0.9911462332 |
| Photoelectric: |
PEPenzhinite = 529.34 barns/electron
U=PEPenzhinite x rElectron Density=3,752.22 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Penzhinite is Not Radioactive |
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Penzhinite Classification
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| Dana Class: |
02.16.18.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.16)with miscellaneous formulae |
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(02.16.18)Dana Group |
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02.16.18.01 Penzhinite (Ag,Cu)4Au(S,Se)4 P 6322 6 2 2 |
| Strunz Class: |
02.BA.40d 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.40d Penzhinite (Ag,Cu)4Au(S,Se)4 P 6322 6 2 2 |
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Other Penzhinite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Penzhinite :
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 Penzhinite Specimen Label here :
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Penzhinite
(Ag,Cu)4Au(S,Se)4
Dana No: 02.16.18.01 Strunz No: 02.BA.40d
Locality:
Notes:
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