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![Mineralogy Database Mineralogy Database](/images/Hedyphane_Crystal.gif) |
Chaoite Mineral Data
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General Chaoite Information
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Chemical Formula: |
C |
Composition: |
Molecular Weight = 12.01 gm |
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Carbon 100.00 % C |
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______ |
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100.00 % |
Empirical Formula: |
C |
Environment: |
Occurs in shock-metamorphosed graphite gneisses, and in ureilite meteorites. Thin lamellae, alternating with graphite. |
IMA Status: |
Approved IMA 1969 |
Locality: |
Ries Crater, Bavaria, Germany. Goalpur and Dyalpur meteorites. Link to MinDat.org Location Data. |
Name Origin: |
Named for Edward C. T. Chao (1919-), Chinese-U.S. Petrologist. |
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Chaoite Image |
Images:
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Chaoite Crystallography
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Axial Ratios: |
a:c = 1:1.57331 |
Cell Dimensions: |
a = 8.948, c = 14.078, Z = 168; V = 976.17 Den(Calc)= 3.43 |
Crystal System: |
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6/mmm |
X Ray Diffraction: |
By Intensity(I/Io): 4.26(1), 4.47(1), 4.12(0.8), |
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Physical Properties of Chaoite
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Color: |
Dark gray. |
Density: |
3.33 - 3.43, Average = 3.38 |
Diaphaneity: |
Subopaque |
Habit: |
Lamellar - Thin laminae producing a lamellar structure. |
Hardness: |
1-2 - Between Talc and Gypsum |
Luster: |
Sub Metallic |
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Calculated Properties of Chaoite
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Electron Density: |
Bulk Density (Electron Density)=3.43 gm/cc note: Specific Gravity of Chaoite =3.43 gm/cc. |
Fermion Index: |
Fermion Index = 0.01 Boson Index = 0.99 |
Photoelectric: |
PEChaoite = 0.16 barns/electron U=PEChaoite x rElectron Density= 0.54 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chaoite is Not Radioactive |
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Chaoite Classification
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Dana Class: |
01.03.06.04 (01)Native Elements |
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(01.03)with semi-metallic and non-metallic elements |
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(01.03.06)Carbon Polymorph group |
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01.03.06.01 Diamond C F d3m 4/m 3 2/m |
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01.03.06.02 Graphite C P 63/mmc 6/m 2/m 2/m |
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01.03.06.03 Lonsdaleite C P 63/mmc 6/m 2/m 2/m |
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01.03.06.04 Chaoite C P 6/mmm 6/m 2/m 2/m |
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01.03.06.05 Fullerite! C60 pseudo-CUBIC 4/m 2/m 2/m |
Strunz Class: |
01.CB.05b 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides) |
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01.C - Metalloids and Nonmetals |
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01.CB -Carbon-silicon family |
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01.CB.05b Chaoite C P 6/mmm 6/m 2/m 2/m |
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Other Chaoite Information
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References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Chaoite :
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
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[WebCrawler]
[Wikipedia]
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Ask about Chaoite here :
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Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
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Print or Cut-and-Paste your Chaoite Specimen Label here :
Chaoite
C
Dana No: 01.03.06.04 Strunz No: 01.CB.05b
Locality:
Notes:
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