Chameanite Mineral Data

Chameanite Mineral Data

General Chameanite Information

Chemical Formula:

(Cu,Fe)4As(Se,S)4

Composition:

Molecular Weight = 617.65 gm

Iron 4.52 % Fe

Copper 36.01 % Cu

Arsenic 12.13 % As

Selenium 44.74 % Se

Sulfur 2.60 % S

______

100.00 %

Empirical Formula:

Cu_3.5Fe²⁺_0.5AsSe_3.5S_0.5

Environment:

Late stage deposits in veins cutting granite.

IMA Status:

Approved IMA 1982

Locality:

From Chameane, Puy-de-Dome, France. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

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Chameanite Crystallography

Cell Dimensions:

a = 11.039, Z = 8; V = 1,345.21 Den(Calc)= 6.10

Crystal System:

Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: I 43m

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

By Intensity(I/I_o): 3.187(1), 1.951(0.9), 1.665(0.8),

Physical Properties of Chameanite

Color:

Gray, Grayish black.

Density:

6.17

Diaphaniety:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Metallic

Optical Properties of Chameanite

RL Color:

Dark gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Chameanite in Air**
λ	R	∑ R(λ)
400 nm	27.40
420 nm	27.10
440 nm	26.80
460 nm	26.50
480 nm	26.10
500 nm	26.60
520 nm	26.90
540 nm	27.10
560 nm	27.30
580 nm	27.50
600 nm	27.70
620 nm	27.80
640 nm	28.00
660 nm	28.20
680 nm	28.40
700 nm	28.70

**Calculated Relative Intensity Colors of Chameanite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	330%
R

Calculated Properties of Chameanite

Electron Density:

r_electron=5.42 gm/cc
note: r_Chameanite=6.10 gm/cc.

Fermion Index

Fermion Index = 0.03515
Boson Index = 0.96485

Photoelectric:

PE_Chameanite= 62.77 barns/electron
U=PE_Chameanite x r_electron= 340.34 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chameanite is Not Radioactive

Chameanite Classification

Dana Class:

3.2.8.1 (3)Sulfides - Sulfosalts

(3.2)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.2.8)Dana Group

3.2.8.1 Chameanite (Cu,Fe)4As(Se,S)4 I 43m 4 3m

Strunz Class:

II/C.11-80 II - Sulfides and sulphosalts

II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1

II/C.11 - Tetrahedrite group

II/C.11-10 Tennantite (Cu,Fe)12As4S13 I 43m 4 3m

II/C.11-20 Argentotennantite (Ag,Cu)10(Zn,Fe)2(As,Sb)4S13 I 43m 4 3m

II/C.11-30 Giraudite (Cu,Zn,Ag)12(As,Sb)4(Se,S)13 I 43m 4 3m

II/C.11-40 Tetrahedrite (Cu,Fe)12Sb4S13 I 43m 4 3m

II/C.11-50 Freibergite (Ag,Cu,Fe)12(Sb,As)4S13 I 43m 4 3m

II/C.11-60 Goldfieldite Cu12(Te,Sb,As)4S13 I 43m 4 3m

II/C.11-70 Hakite (Cu,Hg)3(Sb,As)(Se,S)3 I 43m 4 3m

II/C.11-75 Mgriite Cu3AsSe3 F d3m 4/m 3 2/m

II/C.11-80 Chameanite (Cu,Fe)4As(Se,S)4 I 43m 4 3m

Other Chameanite Information

References:

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

See Also:

Links to other databases for Chameanite :
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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Chameanite

(Cu,Fe)4As(Se,S)4
Dana No: 3.2.8.1 Strunz No: II/C.11-80
Locality:

Notes: