Penzhinite Mineral Data

General Penzhinite Information

Chemical Formula:

(Ag,Cu)4Au(S,Se)4

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 %

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

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 - TrapezohedralH-M Symbol (6 2 2) Space Group: P 6₃22

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.59(1), 2.14(0.9), 2.71(0.9),

Physical Properties of Penzhinite

Color:

Gray white, Steel gray.

Diaphaneity:

Opaque

Luster:

Metallic

Optical Properties of Penzhinite

Optical Data:

NCalc= 2.1 - from Gladstone-Dale relationship (KC = 0.1358) where Ncalc=Dcalc*KC+1

RL Anisotrophism:

Evident, in colors of creamy yellow and greenish gray.

RL Color:

Grayish white.

Calculated Properties of Penzhinite

Electron Density:

Bulk Density (Electron Density)=7.09 gm/cc
note: Specific Gravity of Penzhinite =8.13 gm/cc.

Fermion Index:

Fermion Index = 0.0088537668
Boson Index = 0.9911462332

Photoelectric:

PE_Penzhinite= 529.34 barns/electron
U=PE_Penzhinite x rElectron Density=3,752.22 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Penzhinite is Not Radioactive

Penzhinite Classification

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

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

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 :

Penzhinite

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

Notes: