Mineralogy Database

Penzhinite Mineral Data

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General Penzhinite Information

Help on Chemical  Formula: Chemical Formula: (Ag,Cu)4Au(S,Se)4
Help on Composition: Composition: Molecular Weight = 759.28 gm
   Copper     8.37 %  Cu
   Silver    42.62 %  Ag
   Gold      25.94 %  Au
   Selenium  10.40 %  Se
   Sulfur    12.67 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Ag3CuAuS3Se
Help on Environment: Environment: In a near surface Au-Ag deposit.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Penzhina River, near the Kamchatka Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Penzhinite + Pronunciation Say PENZHINITE
 

Penzhinite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.2323
Help on Cell Dimensions: Cell Dimensions: a = 13.779, c = 16.98, Z = 18; V = 2,791.93 Den(Calc)= 8.13
Help on Crystal System: Crystal System: Hexagonal - Trapezohedral H-M Symbol (6 2 2) Space Group: P 6322
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.59(1), 2.14(0.9), 2.71(0.9),
 

Physical Properties of Penzhinite

Help on Color: Color: Gray white, Steel gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Luster: Luster: Metallic
 

Optical Properties of Penzhinite

Help on Optical Data: Optical Data: NCalc= 2.1 - from Gladstone-Dale relationship (KC = 0.1358) where Ncalc=Dcalc*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Evident, in colors of creamy yellow and greenish gray.
Help on RL Color: RL Color: Grayish white.
 

Calculated Properties of Penzhinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.09 gm/cc
note: Specific Gravity of Penzhinite =8.13 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0088537668
Boson Index = 0.9911462332
Help on Photoelectric: Photoelectric: PEPenzhinite = 529.34 barns/electron
U=PEPenzhinite x rElectron Density=3,752.22 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Penzhinite is Not Radioactive
 

Penzhinite Classification

Help on  Dana Class: Dana Class: 02.16.18.01 (02)Sulfides - Including Selenides and Tellurides
  (02.16)with miscellaneous formulae
  (02.16.18)Dana Group
 
02.16.18.01 Penzhinite (Ag,Cu)4Au(S,Se)4 P 6322 6 2 2
Help on  Strunz Class: Strunz Class: 02.BA.40d 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)
  02.BA -With Cu, Ag, Au
 
02.BA.40d Penzhinite (Ag,Cu)4Au(S,Se)4 P 6322 6 2 2
 

Other Penzhinite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: 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 :

Penzhinite

(Ag,Cu)4Au(S,Se)4
Dana No: 02.16.18.01 Strunz No: 02.BA.40d
Locality:

 

Notes: