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Langisite Mineral Data
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General Langisite Information
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 Chemical Formula: |
(Co,Ni)As |
| Composition: |
Molecular Weight = 133.79 gm |
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Cobalt 33.04 % Co |
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Nickel 10.97 % Ni |
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Arsenic 56.00 % As |
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______ |
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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  |
| Synonym: |
ICSD 60406 |
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IMA1968-023 |
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PDF 24-333 |
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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), |
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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 |
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Optical Properties of Langisite
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| RL Anisotrophism: |
Moderate, in bluish gray and light brown. |
| RL Color: |
Pinkish buff. |
| RL Pleochroism: |
Weak. |
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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 |
| 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 |
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(02.08)where Am Bn Xp, with (m+n):p=1:1 |
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(02.08.11)Nickeline Group (Hexagonal: P63/mmc) |
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02.08.11.01 Nickeline NiAs P 63/mmc 6/m 2/m 2/m |
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02.08.11.02 Breithauptite NiSb P 63/mmc 6/m 2/m 2/m |
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02.08.11.03 Sederholmite NiSe P 63/mmc 6/m 2/m 2/m |
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02.08.11.04 Hexatestibiopanickelite (Ni,Pd)(Te,Sb) P 63/mmc 6/m 2/m 2/m |
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02.08.11.05 Sudburyite (Pd,Ni)Sb P 63/mmc 6/m 2/m 2/m |
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02.08.11.06 Kotulskite Pd(Te,Bi) P 63/mmc 6/m 2/m 2/m |
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02.08.11.07 Sobolevskite PdBi P 63/mmc 6/m 2/m 2/m |
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02.08.11.08 Stumpflite Pt(Sb,Bi) P 63/mmc 6/m 2/m 2/m |
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02.08.11.09 Langisite (Co,Ni)As P 63/mmc 6/m 2/m 2/m |
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02.08.11.10 Freboldite CoSe P 63/mmc 6/m 2/m 2/m |
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02.08.11.11 Achavalite! FeSe P 63/mmc 6/m 2/m 2/m |
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02.08.11.12 Sorosite! Cu(Sn,Sb) P 63/mmc 6/m 2/m 2/m |
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02.08.11.13 Vavrinite! Ni2SbTe2 P 63/mmc 6/m 2/m 2/m |
| Strunz Class: |
02.CC.05 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.CC -With Ni, Fe, Co, PGE, etc. |
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02.CC.05 Achavalite FeSe P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Breithauptite NiSb P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Freboldite CoSe P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Hexatestibiopanickelite (Ni,Pd)(Te,Sb) P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Langisite (Co,Ni)As P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Jaipurite* CoS P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Kotulskite Pd(Te,Bi) P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Nickeline NiAs P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Zlatogorite! CuNiSb2 P 3m1 3 2/m |
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02.CC.05 Sederholmite NiSe P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Stumpflite Pt(Sb,Bi) P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Sudburyite (Pd,Ni)Sb P 63/mmc 6/m 2/m 2/m |
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02.CC.05 Sobolevskite PdBi P 63/mmc 6/m 2/m 2/m |
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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
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Print or Cut-and-Paste your Langisite Specimen Label here :
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Langisite
(Co,Ni)As
Dana No: 02.08.11.09 Strunz No: 02.CC.05
Locality:
Notes:
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