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Gallite Mineral Data
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General Gallite Information
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 Chemical Formula: |
CuGaS2 |
| Composition: |
Molecular Weight = 197.40 gm |
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Gallium 35.32 % Ga |
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Copper 32.19 % Cu |
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Sulfur 32.49 % S |
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______ |
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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 |
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PDF 25-279 |
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Gallite Image |
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Images:
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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 |
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Gallite Crystallography
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| 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 - Scalenohedral H-M Symbol (4 2m) Space Group: I 42d |
| X Ray Diffraction: |
By Intensity(I/Io): 3.064(1), 1.876(0.7), 1.611(0.6), |
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Physical Properties of Gallite
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| Color: |
Gray. |
| Density: |
4.2 |
| Diaphaneity: |
Opaque |
| Hardness: |
3-3.5 - Calcite-Copper Penny |
| Luster: |
Metallic |
| Streak: |
grayish black |
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Optical Properties of Gallite
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| RL Anisotrophism: |
Low. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Gallite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
22.00 |
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| 420 nm |
21.80 |
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| 440 nm |
21.60 |
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| 460 nm |
21.30 |
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| 480 nm |
20.80 |
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| 500 nm |
20.40 |
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| 520 nm |
19.70 |
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| 540 nm |
19.20 |
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| 560 nm |
18.80 |
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| 580 nm |
18.60 |
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| 600 nm |
18.70 |
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| 620 nm |
18.80 |
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| 640 nm |
18.90 |
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| 660 nm |
19.10 |
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| 680 nm |
19.40 |
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| 700 nm |
19.50 |
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Calculated Relative Intensity Colors of Gallite in Air
Relative
Intensity |
0% |
50% |
100% |
150% |
200% |
250% |
300% |
350% |
400% |
450% |
460% |
| R |
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Calculated Properties of Gallite
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| Electron Density: |
Bulk Density (Electron Density)=4.07 gm/cc
note: Specific Gravity of Gallite =4.37 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0024366138
Boson Index = 0.9975633862 |
| Photoelectric: |
PEGallite = 36.07 barns/electron
U=PEGallite x rElectron Density= 146.93 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gallite is Not Radioactive |
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Gallite Classification
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| Dana Class: |
02.09.01.03 (02)Sulfides - Including Selenides and Tellurides |
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(02.09)where Am Bn Xp, with (m+n):p=1:1 |
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(02.09.01)Chalcopyrite Group (Tetragonal: I-42d) |
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02.09.01.01 Chalcopyrite CuFeS2 I 42d 4 2m |
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02.09.01.02 Eskebornite CuFeSe2 I 42d 4 2m |
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02.09.01.03 Gallite CuGaS2 I 42d 4 2m |
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02.09.01.04 Roquesite CuInS2 I 42d 4 2m |
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02.09.01.05 Lenaite AgFeS2 P 42mc 4mm |
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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 |
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02.C - Metal Sulfides, M:S = 1:1 (and similar) |
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02.CB -With Zn, Fe, Cu, Ag, Au, etc |
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02.CB.10a Chalcopyrite CuFeS2 I 42d 4 2m |
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02.CB.10a Eskebornite CuFeSe2 I 42d 4 2m |
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02.CB.10a Gallite CuGaS2 I 42d 4 2m |
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02.CB.10a Laforetite! AgInS2 I 42d 4 2m |
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02.CB.10a Lenaite AgFeS2 P 42mc 4mm |
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02.CB.10a Roquesite CuInS2 I 42d 4 2m |
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Other Gallite Information
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| 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 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Gallite Specimen Label here :
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Gallite
CuGaS2
Dana No: 02.09.01.03 Strunz No: 02.CB.10a
Locality:
Notes:
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