Cervelleite Mineral Data

General Cervelleite Information

Chemical Formula:

Ag4TeS

Composition:

Molecular Weight = 591.14 gm

Silver 72.99 % Ag

Tellurium 21.59 % Te

Sulfur 5.42 % S

______

100.00 %

Empirical Formula:

Ag₄TeS

Environment:

Rimming acanthite.

IMA Status:

Approved IMA 1989

Locality:

La Bambolla (Mina Moctezuma), mine Moctezuma, Sonora, Mexico. Link to MinDat.org Location Data.

Name Origin:

Named for Bernard Cervelle (1940-), French mineralogist.

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Cervelleite Crystallography

Cell Dimensions:

a = 14.03, Z = 24; V = 2,761.68 Den(Calc)= 8.53

Crystal System:

IsometricSpace Group: Unk

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

By Intensity(I/I_o): 5(1), 4.24(0.8), 6.29(0.6),

Physical Properties of Cervelleite

Cleavage:

None

Color:

Gray, Black.

Diaphaneity:

Opaque

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

1.5 - Between Talc and Gypsum

Luster:

Metallic

Calculated Properties of Cervelleite

Electron Density:

Bulk Density (Electron Density)=7.39 gm/cc
note: Specific Gravity of Cervelleite =8.53 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Cervelleite= 268.83 barns/electron
U=PE_Cervelleite x rElectron Density=1,986.09 barns/cc.

Radioactivity:

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

Cervelleite Classification

Dana Class:

02.04.02.02 (02)Sulfides - Including Selenides and Tellurides

(02.04)where Am Bn Xp, with (m+n):p=2:1

(02.04.02)Dana Group

02.04.02.01 Hessite Ag2Te P 2₁/c 2/m

02.04.02.02 Cervelleite Ag4TeS Unk Cubic

Strunz Class:

02.BA.30d 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.30d Cervelleite Ag4TeS Unk Cubic

Other Cervelleite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.75,p1431,1990)

See Also:

Links to other databases for Cervelleite :
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 Cervelleite Specimen Label here :

Cervelleite

Ag4TeS
Dana No: 02.04.02.02 Strunz No: 02.BA.30d
Locality:

Notes: