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Chaoite Mineral Data

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General Chaoite Information

Help on Chemical  Formula: Chemical Formula: C
Help on Composition: Composition: Molecular Weight = 12.01 gm
   Carbon 100.00 %  C
          100.00 % 
Help on Empirical Formula: Empirical Formula: C
Help on Environment: Environment: Occurs in shock-metamorphosed graphite gneisses, and in ureilite meteorites. Thin lamellae, alternating with graphite.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Ries Crater, Bavaria, Germany. Goalpur and Dyalpur meteorites. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Edward C. T. Chao (1919-), Chinese-U.S. Petrologist.

Chaoite Image

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Comments: Dark masses of chaoite intermixed with graphite on rock shocked by meteorite impact.
Location: Ries Crater, Bopfingen, Bavaria, Baden-Wurttemberg. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Chaoite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.57331
Help on Cell Dimensions: Cell Dimensions: a = 8.948, c = 14.078, Z = 168; V = 976.17 Den(Calc)= 3.43
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.26(1), 4.47(1), 4.12(0.8),

Physical Properties of Chaoite

Help on Color: Color: Dark gray.
Help on Density: Density: 3.33 - 3.43, Average = 3.38
Help on Diaphaneity: Diaphaneity: Subopaque
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luster: Luster: Sub Metallic

Calculated Properties of Chaoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.43 gm/cc
note: Specific Gravity of Chaoite =3.43 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEChaoite = 0.16 barns/electron
U=PEChaoite x rElectron Density= 0.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chaoite is Not Radioactive

Chaoite Classification

Help on  Dana Class: Dana Class: (01)Native Elements
  (01.03)with semi-metallic and non-metallic elements
  (01.03.06)Carbon Polymorph group Diamond C F d3m 4/m 3 2/m Graphite C P 63/mmc 6/m 2/m 2/m Lonsdaleite C P 63/mmc 6/m 2/m 2/m Chaoite C P 6/mmm 6/m 2/m 2/m Fullerite! C60 pseudo-CUBIC 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 01.CB.05b 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
  01.C - Metalloids and Nonmetals
  01.CB -Carbon-silicon family
01.CB.05b Chaoite C P 6/mmm 6/m 2/m 2/m

Other Chaoite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Dana No: Strunz No: 01.CB.05b





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