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Lonsdaleite Mineral Data + |
General Lonsdaleite Information |
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| C | |||
| Molecular Weight = 12.01 gm | |||
| Carbon 100.00 % C | |||
| ______ | |||
| 100.00 % | |||
| C | |||
| Associated with diamond in the Canyon Diablo, Goalpara, and Allan Hills 77283 meteorites. Also in diamond-bearing placers. | |||
| Approved IMA 1967 | |||
| Tunguska impact site, Russia. Other world-wide impact sites. Link to MinDat.org Location Data. | |||
| Named for Kathleen Lonsdale (1903-1971), English crystallographer. | |||
| ICSD 27422 | |||
| PDF 19-268 | |||
Lonsdaleite Image | |||
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Lonsdaleite Crystallography |
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| a:c = 1:1.63492 | |||
| a = 2.52, c = 4.12, Z = 4; V = 22.66 Den(Calc)= 3.52 | |||
| Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc | |||
| By Intensity(I/Io): 2.06(1), 2.19(1), 1.26(0.75), | |||
Physical Properties of Lonsdaleite |
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| [???] Perfect | |||
| Brownish black, Light brownish yellow. | |||
| 3.3 - 3.52, Average = 3.41 | |||
| Translucent to Opaque | |||
| Microscopic Crystals - Crystals visible only with microscopes. | |||
| 7-8 | |||
| Adamantine | |||
| brownish yellow | |||
Optical Properties of Lonsdaleite |
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| Uniaxial (+/-), a=2.404, b=2.404, bire=0.0000. | |||
Calculated Properties of Lonsdaleite |
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relectron=3.52 gm/cc |
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| Fermion Index = 0.011 Boson Index = 0.989 |
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PELonsdaleite = 0.16 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Lonsdaleite is Not Radioactive |
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Lonsdaleite Classification |
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| 1.3.6.3 (1)Native Elements | |||
| (1.3)with semi-metallic and non-metallic elements | |||
| (1.3.6)Carbon Polymorph group | |||
| I/B.02-50 I - Elements | |||
| I/B - Semimetals and nonmetals | |||
| I/B.02 - Carbon series, Graphite - Lonsdaleite | |||
Other Lonsdaleite Information |
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| NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) | |||
| Links to other databases for Lonsdaleite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 - Mineral and Gemstone Kingdom 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris Search for Lonsdaleite using: Visit our Advertisers for Lonsdaleite : Translate Lonsdaleite Mineral Data : Ask about Lonsdaleite here : Print or Cut-and-Paste your Lonsdaleite Specimen Label here :
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