Chabourneite Mineral Data

Chabourneite Mineral Data

General Chabourneite Information

Chemical Formula:

(Tl,Pb)21(Sb,As)91S147

Composition:

Molecular Weight = 18184.75 gm

Thallium 15.73 % Tl

Antimony 33.48 % Sb

Arsenic 16.89 % As

Lead 7.98 % Pb

Sulfur 25.92 % S

______

100.00 %

Empirical Formula:

Tl₁₄Pb₇Sb₅₀As₄₁S₁₄₇

Environment:

Hydrothermal deposit in dolomitic limestones with other As-Tl minerals.

IMA Status:

Approved IMA 1976

Locality:

Jas Roux deposit, Hautes-Alpes, France. Link to MinDat.org Location Data.

Name Origin:

Named for the Chabourneou Glacier, near the locality.

Synonym:

ICSD 100315

PDF 35-474

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Chabourneite Crystallography

Axial Ratios:

a:b:c =0.3836:1:0.2003

Cell Dimensions:

a = 16.346, b = 42.602, c = 8.534, Z = 1; alpha = 95.86°, beta = 86.91°, gamma = 96.88° V = 5,860.68 Den(Calc)= 5.15

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

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

By Intensity(I/I_o): 3.573(1), 2.135(0.9), 2.808(0.8),

Physical Properties of Chabourneite

Color:

Black.

Density:

5.1

Diaphaniety:

Opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Sub Metallic

Streak:

brown red

Optical Properties of Chabourneite

RL Anisotrophism:

Strong, in bluish and greenish colors.

RL Color:

White with red internal reflections noted along cracks.

RL Pleochroism:

Weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Chabourneite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	32.40	40.50
420 nm	32.10	40.00
440 nm	31.80	39.50
460 nm	31.50	39.00
480 nm	31.30	38.40
500 nm	31.10	37.90
520 nm	31.00	37.30
540 nm	30.80	36.60
560 nm	30.60	35.80
580 nm	30.20	35.10
600 nm	29.60	34.30
620 nm	29.00	33.50
640 nm	28.20	32.80
660 nm	27.50	32.00
680 nm	26.80	31.30
700 nm	26.40	30.70

**Calculated Relative Intensity Colors of Chabourneite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	310%
R₁
R₂

Calculated Properties of Chabourneite

Electron Density:

r_electron=4.51 gm/cc
note: r_Chabourneite=5.15 gm/cc.

Fermion Index

Fermion Index = 0.01957
Boson Index = 0.98043

Photoelectric:

PE_Chabourneite= 530.46 barns/electron
U=PE_Chabourneite x r_electron=2,392.55 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chabourneite is Not Radioactive

Chabourneite Classification

Dana Class:

3.8.12.1 (3)Sulfides - Sulfosalts

(3.8)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.8.12)Dana Group

3.8.12.1 Chabourneite (Tl,Pb)21(Sb,As)91S147 P1 1

Strunz Class:

II/E.14-50 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Sulfosalts with predominant Thallium and Mercury, x = 4.0 - 1.6

II/E.14 - Rebulite - Chabourneite series

II/E.14-10 Rebulite Tl5Sb5As8S22 P 2₁/c 2/m

II/E.14-12 Jankovicite Tl5Sb9(As,Sb)4S22 P1 1

II/E.14-15 Imhofite Tl6CuAs16S40 P 2₁/n 2/m

II/E.14-20 Bernardite Tl(As,Sb)5S8 P 2₁/c 2/m

II/E.14-25 Gillulyite Tl2(As,Sb)8S13 P 2/n 2/m

II/E.14-30 Pierrotite Tl2Sb6As4S16 P na2₁ mm2

II/E.14-40 Parapierrotite Tl(Sb,As)5S8 P 2₁/n 2/m

II/E.14-50 Chabourneite (Tl,Pb)21(Sb,As)91S147 P1 1

Other Chabourneite Information

References:

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

See Also:

Links to other databases for Chabourneite :
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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Chabourneite

(Tl,Pb)21(Sb,As)91S147
Dana No: 3.8.12.1 Strunz No: II/E.14-50
Locality:

Notes: