Gallite Mineral Data

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General Gallite Information

Chemical Formula:

CuGaS2

Composition:

Molecular Weight = 197.40 gm

Gallium 35.32 % Ga

Copper 32.19 % Cu

Sulfur 32.49 % S

______

100.00 %

Empirical Formula:

CuGaS₂

Environment:

In base-metal vein deposits with relatively high gallium content.

IMA Status:

Valid Species (Pre-IMA) 1958

Locality:

At Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

For the mineral's gallium content.

Name Pronunciation:

Gallite

Synonym:

ICSD 28736

PDF 25-279

Gallite Image

Images:

Gallite

Comments: A mixture of massive high grade ore with grains of gallite (gray) occuring with germanite and renierite. Most of what can be seen is the renierite, which has reddish and purple iridescence.
Location: Tsumeb, Namibia. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Gallite Crystallography

Axial Ratios:

a:c = 1:1.95887

Cell Dimensions:

a = 5.35, c = 10.48, Z = 4; V = 299.96 Den(Calc)= 4.37

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): 3.064(1), 1.876(0.7), 1.611(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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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, Locality: Synthetic sample

View Additional jPOWD Structure files for Gallite
[1]

Physical Properties of Gallite

Color:

Gray.

Density:

4.2

Diaphaneity:

Opaque

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Metallic

Streak:

grayish black

Optical Properties of Gallite

RL Anisotrophism:

Low.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Gallite in Air**
λ	R	∑ R(λ)
400 nm	22.00
420 nm	21.80
440 nm	21.60
460 nm	21.30
480 nm	20.80
500 nm	20.40
520 nm	19.70
540 nm	19.20
560 nm	18.80
580 nm	18.60
600 nm	18.70
620 nm	18.80
640 nm	18.90
660 nm	19.10
680 nm	19.40
700 nm	19.50

**Calculated Relative Intensity Colors of Gallite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	450%	460%
R

Calculated Properties of Gallite

Electron Density:

Bulk Density (Electron Density)=4.07 gm/cc
note: Specific Gravity of Gallite =4.37 gm/cc.

Fermion Index:

Fermion Index = 0.0024366138
Boson Index = 0.9975633862

Photoelectric:

PE_Gallite= 36.07 barns/electron
U=PE_Gallite x rElectron Density= 146.93 barns/cc.

Radioactivity:

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

Gallite Classification

Dana Class:

02.09.01.03 (02)Sulfides - Including Selenides and Tellurides

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

(02.09.01)Chalcopyrite Group (Tetragonal: I-42d)

02.09.01.01 Chalcopyrite CuFeS2 I 42d 4 2m

02.09.01.02 Eskebornite CuFeSe2 I 42d 4 2m

02.09.01.03 Gallite CuGaS2 I 42d 4 2m

02.09.01.04 Roquesite CuInS2 I 42d 4 2m

02.09.01.05 Lenaite AgFeS2 P 4₂mc 4mm

02.09.01.06 Laforetite! AgInS2 I 42d 4 2m

Strunz Class:

02.CB.10a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.C - Metal Sulfides, M:S = 1:1 (and similar)

02.CB -With Zn, Fe, Cu, Ag, Au, etc

02.CB.10a Chalcopyrite CuFeS2 I 42d 4 2m

02.CB.10a Eskebornite CuFeSe2 I 42d 4 2m

02.CB.10a Gallite CuGaS2 I 42d 4 2m

02.CB.10a Laforetite! AgInS2 I 42d 4 2m

02.CB.10a Lenaite AgFeS2 P 4₂mc 4mm

02.CB.10a Roquesite CuInS2 I 42d 4 2m

Other Gallite Information

References:

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

See Also:

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

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

Gallite

CuGaS2
Dana No: 02.09.01.03 Strunz No: 02.CB.10a
Locality:

Notes: