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Langisite Mineral Data |
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Langisite Mineral Data |
General Langisite Information |
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 Chemical Formula: |
(Co,Ni)As | ||
| Composition: |
Molecular Weight = 133.79 gm | ||
| Cobalt 33.04 % Co | |||
| Nickel 10.97 % Ni | |||
| Arsenic 56.00 % As | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
Co0.75Ni0.25As | ||
| Environment: |
In pockets of ore minerals, mineralized fault gouge, and breccia cemented with calcite and quartz. Lamellar inclusions in safflorite. | ||
| IMA Status: |
Approved IMA 1969 | ||
| Locality: |
Langis mine, Casey Township, Cobalt-Gowganda area, Ontario, Canada. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Name Pronunciation: |
Langisite + Pronunciation  |
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| Synonym: |
ICSD 60406 | ||
| IMA1968-023 | |||
| PDF 24-333 | |||
Langisite Image | |||
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Images:
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Langisite Crystallography |
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| Axial Ratios: |
a:c = 1:1.44912 | ||
| Cell Dimensions: |
a = 3.538, c = 5.127, Z = 2; V = 55.58 Den(Calc)= 7.99 | ||
| Crystal System: |
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.631(1), 1.966(0.9), 1.77(0.8), | ||
Physical Properties of Langisite |
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| Color: |
Pink, Reddish gray. | ||
| Density: |
8.17 | ||
| Diaphaneity: |
Opaque | ||
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes | ||
| Habit: |
Inclusions - Generally found as inclusions in other minerals. | ||
| Hardness: |
6-6.5 - Orthoclase-Pyrite | ||
| Luster: |
Metallic | ||
Optical Properties of Langisite |
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| RL Anisotrophism: |
Moderate, in bluish gray and light brown. | ||
| RL Color: |
Pinkish buff. | ||
| RL Pleochroism: |
Weak. | ||
Calculated Properties of Langisite |
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| Electron Density: |
Bulk Density (Electron Density)=7.20 gm/cc note: Specific Gravity of Langisite =7.99 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0012392129 Boson Index = 0.9987607871 |
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| Photoelectric: |
PELangisite = 56.76 barns/electron U=PELangisite x rElectron Density= 408.43 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Langisite is Not Radioactive |
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Langisite Classification |
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| Dana Class: |
02.08.11.09 (02)Sulfides - Including Selenides and Tellurides | ||
| (02.08)where Am Bn Xp, with (m+n):p=1:1 | |||
| (02.08.11)Nickeline Group (Hexagonal: P63/mmc) | |||
| Strunz Class: |
02.CC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf | ||
| 02.C - Metal Sulfides, M:S = 1:1 (and similar) | |||
| 02.CC -With Ni, Fe, Co, PGE, etc. | |||
Other Langisite 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 Langisite : 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 Search for Langisite using: Visit our Advertisers for Langisite : Ask about Langisite here : Print or Cut-and-Paste your Langisite Specimen Label here :
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