SUPPORT US. Covid-19 has significantly affected our fundraising. Please help!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Chaoite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About ChaoiteHide

08934270015082817706040.jpg
Edward C.-T. Chao
Formula:
C
Colour:
Black
Hardness:
1 - 2
Specific Gravity:
3.43 (Calculated)
Crystal System:
Hexagonal
Name:
Named by A. El Goresy in 1969 (described a year earlier) in honor of Edward Ching-Te Chao (30 November 1919, Suzhou, China - 3 February 2008, Fairfax, Virginia, USA), geologist and petrologist with the United States Geological Survey, for his pioneering work on impact metamorphism. Chaoite is formed during meteorite impacts, as are two silica minerals that Dr. Chao famously discovered: coesite and stishovite.
This page provides mineralogical data about Chaoite.


Classification of ChaoiteHide

Approved
Approval Year:
1968
First Published:
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 ChaoiteHide

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

Chemical Properties of ChaoiteHide

Formula:
C
Common Impurities:
Si,Cl

Crystallography of ChaoiteHide

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.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.47 Å(100)
4.26 Å(100)
4.12 Å(80)
3.71 Å(40)
3.03 Å(60)
2.55 Å(60)
2.28 Å(60)

Geological EnvironmentHide

Geological Setting:
Meteorites

Type Occurrence of ChaoiteHide

General Appearance of Type Material:
Thin lamellae to 15 um alternating with graphite.
Place of Conservation of Type Material:
Unknown
Geological Setting of Type Material:
Shock metamorphosed graphite bearing gneiss.
Reference:
El Goresy, A., Donnay, G. (1968) A new allotropic form of carbon from the Ries crater. Science: 161: 363-364.

Synonyms of ChaoiteHide

Other Language Names for ChaoiteHide

German:Chaoit
Simplified Chinese:赵石墨
Spanish:Chaoita

Related Minerals - Nickel-Strunz GroupingHide

1.CB.05aGraphiteCHex. 6mm : P63mc
1.CB.05cFulleriteC60Tet.
1.CB.10aDiamondCIso. m3m (4/m 3 2/m) : Fd3m
1.CB.10bLonsdaleiteCHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
1.CB.15SiliconSiIso. m3m (4/m 3 2/m) : Fd3m

Related Minerals - Dana Grouping (8th Ed.)Hide

1.3.6.1DiamondCIso. m3m (4/m 3 2/m) : Fd3m
1.3.6.2GraphiteCHex. 6mm : P63mc
1.3.6.3LonsdaleiteCHex. 6/mmm (6/m 2/m 2/m) : P63/mmc

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

1.1CopperCuIso. m3m (4/m 3 2/m) : Fm3m
1.2SilverAgIso. m3m (4/m 3 2/m) : Fm3m
1.5GoldAuIso. m3m (4/m 3 2/m) : Fm3m
1.6AuricuprideCu3AuOrth.
1.7Tetra-auricuprideAuCuTet.
1.8ZincZnHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
1.9CadmiumCdHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
1.10DanbaiteCuZn2Iso.
1.11ZhanghengiteCuZnIso.
1.12MercuryHgTrig. 3m (3 2/m) : R3m
1.13KolymiteCu7Hg6Iso.
1.14MoschellandsbergiteAg2Hg3Iso. m3m (4/m 3 2/m)
1.15EugeniteAg11Hg2Iso.
1.16SchachneriteAg1.1Hg0.9Hex.
1.17ParaschachneriteAg3Hg2Orth.
1.18LuanheiteAg3HgHex.
1.19Weishanite(Au,Ag,Hg)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
1.20IndiumInTet.
1.21AluminiumAlIso. m3m (4/m 3 2/m) : Fm3m
1.22Khatyrkite(Cu,Zn)Al2Tet.
1.23Cupalite(Cu,Zn)AlOrth.
1.24DiamondCIso. m3m (4/m 3 2/m) : Fd3m
1.25GraphiteCHex. 6mm : P63mc
1.27LonsdaleiteCHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
1.28SiliconSiIso. m3m (4/m 3 2/m) : Fd3m
1.29TinSnTet. 4/mmm (4/m 2/m 2/m) : I41/amd
1.30LeadPbIso. m3m (4/m 3 2/m) : Fm3m
1.31AnyuiiteAuPb2Tet. 4/mmm (4/m 2/m 2/m) : I4/mcm
1.31NovodnepriteAuPb3Tet. 4 2m : I4 2m
1.32LeadamalgamPb0.7Hg0.3Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
1.33ArsenicAsTrig. 3m (3 2/m) : R3m
1.34ArsenolampriteAsOrth. mmm (2/m 2/m 2/m)
1.35PaxiteCuAs2Mon.
1.36KoutekiteCu5As2Hex.
1.37DomeykiteCu3AsIso. 4 3m : I4 3d
1.38Algodonite(Cu1-xAsx)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
1.39NovákiteCu20AgAs10Mon.
1.40KutinaiteAg6Cu14As7Iso.
1.41AntimonySbTrig. 3m (3 2/m) : R3m
1.42StibarsenAsSbTrig. 3m (3 2/m) : R3m
1.43ParadocrasiteSb3AsMon. 2 : B2
1.44HorsforditeCu, Sb
1.45CuprostibiteCu2(Sb,Tl)Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
1.46Allargentum(Ag1-xSbx)Hex.
1.47AurostibiteAuSb2Iso. m3 (2/m 3) : Pa3
1.48DyscrasiteAg3SbOrth. mm2 : Pmm2
1.49BismuthBiTrig. 3m (3 2/m) : R3m
1.50MaldoniteAu2BiIso. m3m (4/m 3 2/m) : Fd3m
1.51SulphurS8Orth. mmm (2/m 2/m 2/m) : Fddd
1.52RosickýiteSMon. 2/m : P2/b
1.53SeleniumSeTrig. 3 2 : P31 2 1
1.54TelluriumTeTrig. 3 2 : P31 2 1
1.55ChromiumCrIso. m3m (4/m 3 2/m) : Im3m
1.56RheniumReHex.
1.57IronFeIso. m3m (4/m 3 2/m) : Im3m
1.58ChromferideFe3Cr1-x (x=0.6)Iso. m3m (4/m 3 2/m) : Pm3m
1.59FerchromideCr3Fe1-xIso. m3m (4/m 3 2/m) : Pm3m
1.60WairauiteCoFeIso.
1.61NickelNiIso. m3m (4/m 3 2/m) : Fm3m
1.62Kamacite(Fe,Ni)Iso.
1.63Taenite(Fe,Ni)Iso. m3m (4/m 3 2/m) : Fm3m
1.64TetrataeniteFeNiTet.
1.65AwaruiteNi3FeIso. m3m (4/m 3 2/m) : Fm3m
1.66Palladium(Pd,Pt)Iso. m3m (4/m 3 2/m) : Fm3m
1.67PotaritePdHgTet. 4/mmm (4/m 2/m 2/m) : P4/mmm
1.68PaolovitePd2SnOrth.
1.69Stannopalladinite(Pd,Cu)3Sn2Hex.
1.70CabriitePd2CuSnOrth. mmm (2/m 2/m 2/m) : Pmmm
1.71Taimyrite(Pd,Cu,Pt)3SnOrth.
1.72Atokite(Pd,Pt)3SnIso. m3m (4/m 3 2/m) : Fm3m
1.73Rustenburgite(Pt,Pd)3SnIso. m3m (4/m 3 2/m) : Fm3m
1.74ZvyagintsevitePd3PbIso. m3m (4/m 3 2/m) : Pm3n
1.75PlumbopalladinitePd3Pb2Hex.
1.76Osmium(Os,Ir,Ru)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
1.77Iridium(Ir,Os,Ru)Iso.
1.82PlatinumPtIso. m3m (4/m 3 2/m) : Fm3m
1.83HongshiitePtCuTrig.
1.84NiggliitePtSnHex.
1.85IsoferroplatinumPt3FeIso.
1.86TetraferroplatinumPtFeTet.
1.87TulameenitePt2CuFeTet.
1.88FerronickelplatinumPt2FeNiTet.
1.89Rhodium(Rh,Pt)Iso.

Other InformationHide

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 ChaoiteHide

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.
Vdovykin (1969) Geokhimina: 1145-1148.
El Goresy, A. (1969) Eine neue kohlnestoff-modifikation aus dem Nördlinger Ries. Naturwissenschaften: 56: 493-494.
Fleischer, M. (1970) New mineral names. American Mineralogist: 55: 1067-1073.
Smith, P.P.K., Buseck, P.R. (1982) Carbyne forms of carbon: Do they exist?. Science: 216: 984-986.
Sobolev, V.V., Slobodskoy, V.Y., Selyukov, S.N., Udoyev, A.A. (1986) Some conversions of chaoite to other carbon phases. Zap. Vses. Mineral. Obshch.: 115: 218–221. (in Russian)
Dunn, P.J., Fleischer, M., Chao, G.Y., Cabri, L.J., Mandarino, J.A. (1983) New mineral names. American Mineralogist: 68: 1248-1252.

Internet Links for ChaoiteHide

Localities for ChaoiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Finland
 
  • Southwest Finland
    • Pargas
      • Nauvo
Vdovykin, G.P. 1972. Forms of carbon in the new Haverö ureilite of Finland. Meteoritics 7 (4) 547-552.
Germany (TL)
 
  • Bavaria
    • Swabia
      • Donau-Ries District
El Goresy A, Donnay G (1968) A new allotropic form of carbon from the Ries Crater. Science 161, 363-364 ; Amer. Mineral., 54, 326
India
 
  • Assam
    • Goalpara District
Handbook of Mineralogy
  • Uttar Pradesh
    • Sultanpur District
Handbook of Mineralogy
Russia
 
  • Krasnoyarsk Krai
    • Taymyrsky Dolgano-Nenetsky District
Pavel M. Kartashov data
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2020, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: August 7, 2020 05:18:14 Page generated: July 31, 2020 03:35:13
Go to top of page