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Chaoite

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Formula:
C
Colour:
Black
Hardness:
1 - 2
Specific Gravity:
3.43 (Calculated)
Crystal System:
Hexagonal
Name:
For Edward Ching-Te Chao (1919-2008), USGS petrologist.
This page provides mineralogical data about Chaoite.


Classification of Chaoite

Approved
Approval Year:
1968
1.CB.05b

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
C : Metalloids and Nonmetals
B : Carbon-silicon family
Dana 7th ed.:
1.3.5.4
1.3.6.4

1 : NATIVE ELEMENTS AND ALLOYS
3 : Semi-metals and non-metals
1.26

1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)

Physical Properties of Chaoite

Transparency:
Opaque
Colour:
Black
Hardness:
1 - 2 on Mohs scale
Density:
3.43 g/cm3 (Calculated)

Chemical Properties of Chaoite

Formula:
C
Common Impurities:
Si,Cl

Crystallography of Chaoite

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P6/mmm
Setting:
P6/mmm
Cell Parameters:
a = 8.948 Å, c = 14.078 Å
Ratio:
a:c = 1 : 1.573
Unit Cell V:
976.17 ų (Calculated from Unit Cell)
Z:
168
Morphology:
Thin lamellae alternating with graphite.

Type Occurrence of Chaoite

Geological Setting of Type Material:
Shock metamorphosed graphite bearing gneiss

Synonyms of Chaoite

Other Language Names for Chaoite

German:Chaoit
Simplified Chinese:赵石墨
Spanish:Chaoita

Related Minerals - Nickel-Strunz Grouping

1.CB.05aGraphiteC
1.CB.05cFulleriteC60
1.CB.10aDiamondC
1.CB.10bLonsdaleiteC
1.CB.15SiliconSi

Related Minerals - Hey's Chemical Index of Minerals Grouping

1.1CopperCu
1.2SilverAg
1.5GoldAu
1.6AuricuprideCu3Au
1.7Tetra-auricuprideAuCu
1.8ZincZn
1.9CadmiumCd
1.10DanbaiteCuZn2
1.11ZhanghengiteCuZn
1.12MercuryHg
1.13KolymiteCu7Hg6
1.14MoschellandsbergiteAg2Hg3
1.15EugeniteAg11Hg2
1.16SchachneriteAg1.1Hg0.9
1.17ParaschachneriteAg3Hg2
1.18LuanheiteAg3Hg
1.19Weishanite(Au,Ag)3Hg2
1.20IndiumIn
1.21AluminiumAl
1.22Khatyrkite(Cu,Zn)Al2
1.23Cupalite(Cu,Zn)Al
1.24DiamondC
1.25GraphiteC
1.27LonsdaleiteC
1.28SiliconSi
1.29TinSn
1.30LeadPb
1.31AnyuiiteAuPb2
1.31NovodnepriteAuPb3
1.32LeadamalgamPb0.7Hg0.3
1.33ArsenicAs
1.34ArsenolampriteAs
1.35PaxiteCuAs2
1.36KoutekiteCu5As2
1.37DomeykiteCu3As
1.38Algodonite(Cu1-xAsx)
1.39NovákiteCu20AgAs10
1.40KutinaiteAg6Cu14As7
1.41AntimonySb
1.42StibarsenAsSb
1.43ParadocrasiteSb3As
1.44HorsforditeCu, Sb
1.45CuprostibiteCu2(Sb,Tl)
1.46Allargentum(Ag1-xSbx)
1.47AurostibiteAuSb2
1.48DyscrasiteAg3Sb
1.49BismuthBi
1.50MaldoniteAu2Bi
1.51SulphurS8
1.52RosickýiteS
1.53SeleniumSe
1.54TelluriumTe
1.55ChromiumCr
1.56RheniumRe
1.57IronFe
1.58ChromferideFe3Cr1-x (x=0.6)
1.59FerchromideCr3Fe1-x
1.60WairauiteCoFe
1.61NickelNi
1.62Kamacite(Fe,Ni)
1.63Taenite(Fe,Ni)
1.64TetrataeniteFeNi
1.65AwaruiteNi3Fe
1.66Palladium(Pd,Pt)
1.67PotaritePdHg
1.68PaolovitePd2Sn
1.69Stannopalladinite(Pd,Cu)3Sn2
1.70CabriitePd2CuSn
1.71Taimyrite(Pd,Cu,Pt)3Sn
1.72Atokite(Pd,Pt)3Sn
1.73Rustenburgite(Pt,Pd)3Sn
1.74Zvyagintsevite(Pd,Pt,Au)3(Pb,Sn)
1.75PlumbopalladinitePd3Pb2
1.76Osmium(Os,Ir,Ru)
1.77Iridium(Ir,Os,Ru)
1.82PlatinumPt
1.83HongshiitePtCu
1.84NiggliitePtSn
1.85IsoferroplatinumPt3Fe
1.86TetraferroplatinumPtFe
1.87TulameenitePt2CuFe
1.88FerronickelplatinumPt2FeNi
1.89Rhodium(Rh,Pt)

Related Minerals - Dana Grouping (8th Ed.)

1.3.6.1DiamondC
1.3.6.2GraphiteC
1.3.6.3LonsdaleiteC

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Chaoite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
El Goresy, A., Donnay, G. (1968) A new allotropic form of carbon from the Ries crater. Science: 161: 363-364.
Fleischer, M. (1969) New mineral names. American Mineralogist: 54: 326-330.

Internet Links for Chaoite

mindat.org URL:
https://www.mindat.org/min-1207.html
Please feel free to link to this page.

Localities for Chaoite

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Finland
 
  • Southwestern Finland Region
    • Pargas (Parainen)
      • Nauvo
Vdovykin, G.P. 1972. Forms of carbon in the new Haverö ureilite of Finland. Meteoritics 7 (4) 547-552.
Germany (TL)
 
  • Bavaria
    • Swabia
      • Nördlinger Ries Crater
Science (1968) 161, 363–364; Amer. Mineral., 54, 326
India
 
  • Assam
Handbook of Mineralogy
  • Uttar Pradesh
Handbook of Mineralogy
Russia
 
  • Eastern-Siberian Region
    • Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai)
      • Anabarskii massif
        • Popigai river
Pavel M. Kartashov data
Mineral and/or Locality  
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