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Science 24 February 1967:
Vol. 155. no. 3765, pp. 995 - 997
DOI: 10.1126/science.155.3765.995
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Articles

Hexagonal Diamonds in Meteorites: Implications

R. E. Hanneman 1, H. M. Strong 1, and F. P. Bundy 1

1 Research and Development Center, General Electric Company, Schenectady, New York 12301

A new polymorph of carbon, hexagonal diamond, has been discovered in the Canyon Diablo and Goalpara meteorites. This phase had been synthesized recently under specific high-pressure conditions in the laboratory. Our results: provide strong evidence that diamonds found in these meteorites were produced by intense shock pressures acting on crystalline graphite inclusions present within the meteorite before impact, rather than by disintegration of larger, statically grown diamonds, as some theories propose.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Shock-synthesized hexagonal diamonds in Younger Dryas boundary sediments.
D. J. Kennett, J. P. Kennett, A. West, G. J. West, T. E. Bunch, B. J. Culleton, J. M. Erlandson, S. S. Que Hee, J. R. Johnson, C. Mercer, et al. (2009)
PNAS 106, 12623-12628
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Cathodoluminescence investigations on the Popigai, Ries, and Lappajarvi impact diamonds.
G. Pratesi, G. Pratesi, A. L. Giudice, S. Vishnevsky, C. Manfredotti, and C. Cipriani (2003)
American Mineralogist 88, 1778-1787
   Abstract »    Full Text »    PDF »
A Hexagonal (Wurtzite) Form of Silicon.
H. M. JENNINGS and M. H. RICHMAN (1976)
Science 193, 1242-1243
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Science. ISSN 0036-8075 (print), 1095-9203 (online)