Roquesite Mineral Data

Roquesite Mineral Data +

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General Roquesite Information

Chemical Formula:

CuInS2

Composition:

Molecular Weight = 242.50 gm

Indium 47.35 % In

Copper 26.20 % Cu

Sulfur 26.45 % S

______

100.00 %

Empirical Formula:

CuInS₂

Environment:

In association with copper sulfides in high-temperature Sn-W-Bi-Mo hydrothermal veins in highly metamorphosed rocks. Occures as inclusions in bornite.

IMA Status:

Approved IMA 1963

Locality:

Charrier, Allier, France. Link to MinDat.org Location Data.

Name Origin:

Named for Maurice Roques, University of Clairmont-Gerrand, France.

Synonym:

ICSD 28739

PDF 27-159

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Roquesite Crystallography

Axial Ratios:

a:c = 1:2.00544

Cell Dimensions:

a = 5.51, c = 11.05, Z = 4; V = 335.48 Den(Calc)= 4.80

Crystal System:

Tetragonal - ScalenohedralH-M Symbol (4 2m) Space Group: I 42d

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

By Intensity(I/I_o): 3.16(1), 1.94(0.8), 1.66(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Abrahams S C , Bernstein J L , Journal of Chemical Physics , 59 (1973) p.5415-5420, Piezoelectric nonlinear optic CuGaS2 and CuInS2 crystal structure:, Sublattice distortion in AIBIIIC2VI and AIIBIVC2V type chalcopyrites, Note: Synthetic sample

View Additional jPOWD Structure files for Roquesite
[1]

Physical Properties of Roquesite

Color:

Gray.

Diaphaniety:

Opaque

Habit:

Inclusions - Generally found as inclusions in other minerals.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Metallic

Optical Properties of Roquesite

RL Anisotrophism:

Very weak.

RL Color:

Gray with a slight bluish tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Roquesite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	27.10	27.20
420 nm	25.60	26.00
440 nm	24.10	24.80
460 nm	23.40	24.00
480 nm	23.00	23.40
500 nm	22.60	23.00
520 nm	22.50	22.70
540 nm	22.20	22.50
560 nm	22.20	22.40
580 nm	22.10	22.40
600 nm	22.10	22.40
620 nm	22.20	22.50
640 nm	22.30	22.60
660 nm	22.40	22.70
680 nm	22.60	22.90
700 nm	22.80	23.10

**Calculated Relative Intensity Colors of Roquesite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%
R₁
R₂

Calculated Properties of Roquesite

Electron Density:

r_electron=4.35 gm/cc
note: r_Roquesite=4.80 gm/cc.

Fermion Index

Fermion Index = 0.00198
Boson Index = 0.99802

Photoelectric:

PE_Roquesite= 149.04 barns/electron
U=PE_Roquesite x r_electron= 649.03 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Roquesite is Not Radioactive

Roquesite Classification

Dana Class:

2.9.1.4 (2)Sulfides - Including Selenides and Tellurides

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

(2.9.1)Chalcopyrite Group (Tetragonal: I4¯2d)

2.9.1.1 Chalcopyrite CuFeS2 I 42d 4 2m

2.9.1.2 Eskebornite CuFeSe2 I 42d 4 2m

2.9.1.3 Gallite CuGaS2 I 42d 4 2m

2.9.1.4 Roquesite CuInS2 I 42d 4 2m

2.9.1.5 Lenaite AgFeS2 I 42d 4 2m

2.9.1.6 Laforetite! AgInS2 I 42d 4 2m

Strunz Class:

II/C.03-40 II - Sulfides and sulphosalts

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

II/C.03 - Chalcopyrite group and related compounds

II/C.03-10 Chalcopyrite CuFeS2 I 42d 4 2m

II/C.03-20 Eskebornite CuFeSe2 I 42d 4 2m

II/C.03-25 Lenaite AgFeS2 I 42d 4 2m

II/C.03-30 Gallite CuGaS2 I 42d 4 2m

II/C.03-40 Roquesite CuInS2 I 42d 4 2m

II/C.03-50 Laforetite! AgInS2 I 42d 4 2m

Other Roquesite Information

References:

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

See Also:

Links to other databases for Roquesite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

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Roquesite

CuInS2
Dana No: 2.9.1.4 Strunz No: II/C.03-40
Locality:

Notes: