General Tongbaite Information Chemical Formula: |
Cr3C2 |
Composition: |
Molecular Weight = 180.01 gm |
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Chromium 86.66 % Cr |
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Carbon 13.34 % C |
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______ |
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100.00 % |
Empirical Formula: |
Cr3C2 |
Environment: |
In ultramafic rocks. |
IMA Status: |
Approved IMA 1983 |
Locality: |
Liu Zhuang, Tongbai County, Henan, China Link to MinDat.org Location Data. |
Name Origin: |
Named for the locality. |
Name Pronunciation: |
Tongbaite + Pronunciation |
Synonym: |
ICSD 15086 |
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PDF 35-804 |
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Images:
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| | Tongbaite Crystallography Axial Ratios: |
a:b:c =0.4856:1:0.2455 |
Cell Dimensions: |
a = 5.57, b = 11.47, c = 2.816, Z = 4; V = 179.91 Den(Calc)= 6.65 |
Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma |
X Ray Diffraction: |
By Intensity(I/Io): 2.3(1), 2.23(0.8), 1.193(0.7), |
Crystal Structure:
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Mouse
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| Physical Properties of Tongbaite Color: |
Light brownish yellow. |
Diaphaneity: |
Opaque |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Hardness: |
8.5 - Chrysoberyl |
Luster: |
Metallic |
Streak: |
dark gray |
| Optical Properties of Tongbaite Optical Data: |
Biaxial (?) |
RL Anisotrophism: |
Strong, purplish yellow to yellow-orange. |
RL Bireflectance: |
Distinct. |
RL Color: |
Pale violet. |
RL Pleochroism: |
Distinct. |
Reflectivity |
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| Calculated Properties of Tongbaite Electron Density: |
Bulk Density (Electron Density)=6.21 gm/cc |
note: Specific Gravity of Tongbaite =6.65 gm/cc. Fermion Index: |
Fermion Index = 0.08 |
Boson Index = 0.92 Photoelectric: |
PETongbaite = 19.96 barns/electron |
U=PETongbaite x rElectron Density= 123.90 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Tongbaite is Not Radioactive | Tongbaite Classification Dana Class: |
01.01.17.01 (01)Native Elements |
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(01.01)with metallic elements other than the platinum group |
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(01.01.17)Dana Group |
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Strunz Class: |
01.BA.15 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides) |
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01.B - Metallic Carbides, Silicides, Nitrides and Phosphides |
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01.BA -Carbides |
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| Other Tongbaite Information References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3) |
See Also: |
Links to other databases for Tongbaite : |
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 Search for Tongbaite using: Visit our Advertisers for Tongbaite : A Bijoux Google Search for TongbaiteAdam's Minerals Google Search for Tongbaite Cape Minerals Google Search for Tongbaite Dakota Matrix Minerals Google Search for Tongbaite Excalibur Mineral Corp. Google Search for Tongbaite Exceptional Minerals Google Search for Tongbaite John Betts Fine Minerals Search for Tongbaite McDougall Minerals Google Search for Tongbaite Mineral News Website Link Rock and Mineral Shows Google Search for Tongbaite Weinrich Minerals, Inc. Google Search for Tongbaite Ask about Tongbaite here : Print or Cut-and-Paste your Tongbaite Specimen Label here :
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