Brezinaite Mineral Data

Brezinaite Mineral Data +

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General Brezinaite Information

Chemical Formula:

Cr3S4

Composition:

Molecular Weight = 284.25 gm

Chromium 54.88 % Cr

Sulfur 45.12 % S

______

100.00 %

Empirical Formula:

Cr₃S₄

Environment:

In the metal matrix and contiguous to silicate inclusions (Tucson iron meteorite).

IMA Status:

Approved IMA 1969

Locality:

In the Tucson and New Baltimore iron meteorites. Link to MinDat.org Location Data.

Name Origin:

For Aristides Brezina (1848-1909), past Director of the Mineralogy-Petrology Section of the Natural History Museum, Vienna, Austria.

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Brezinaite Crystallography

Axial Ratios:

a:b:c =1.7401:1:3.2905

Cell Dimensions:

a = 5.96, b = 3.425, c = 11.27, Z = 2; beta = 91.533° V = 229.97 Den(Calc)= 4.10

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m

Crystal Structure:

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Jellinek F , Acta Crystallographica , 10 (1957) p.620-628, The structures of the chromium sulphides, Locality: synthetic

Physical Properties of Brezinaite

Color:

Brownish gray, Gray.

Density:

4.12

Diaphaniety:

Opaque

Hardness:

3.5-4.5 - Between Copper Penny and Fluorite-Apatite

Luster:

Metallic - Dull

Optical Properties of Brezinaite

RL Color:

Brownish gray.

Calculated Properties of Brezinaite

Electron Density:

r_electron=3.92 gm/cc
note: r_Brezinaite=4.10 gm/cc.

Fermion Index

Fermion Index = 0.05551
Boson Index = 0.94449

Photoelectric:

PE_Brezinaite= 14.86 barns/electron
U=PE_Brezinaite x r_electron= 58.30 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Brezinaite is Not Radioactive

Brezinaite Classification

Dana Class:

2.10.2.2 (2)Sulfides - Including Selenides and Tellurides

(2.10)where Am Bn Xp, with (m+n):p=3:4

(2.10.2)Dana Group

2.10.2.1 Wilkmanite Ni3Se4 I2/m 2/m

2.10.2.2 Brezinaite Cr3S4 I2/m 2/m

2.10.2.3 Heideite (Fe,Cr)1x(Ti,Fe)2S4 I2/m 2/m

Strunz Class:

II/D.05-10 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.05 - Bretzinaite ? series

II/D.05-10 Brezinaite Cr3S4 I2/m 2/m

II/D.05-20 Wilkmanite Ni3Se4 I2/m 2/m

Other Brezinaite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Brezinaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Print or Cut-and-Paste your Brezinaite Specimen Label here :

Brezinaite

Cr3S4
Dana No: 2.10.2.2 Strunz No: II/D.05-10
Locality:

Notes: