The nature and origin of interstellar diamond

Details The nature and origin of interstellar diamond The nature and origin of interstellar diamond

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.332..611b&link_type=abstract

Nature (ISSN 0028-0836), vol. 332, April 14, 1988, p. 611-613. NASA-DOE-supported research.

Computer Science

36

Diamonds, Interstellar Matter, Meteoritic Composition, Allende Meteorite, Crystallites, Diffraction Patterns, Energy Spectra, High Resolution, Meteorites, C Chondrites, Carbonaceous Chondrites, Allende, Cv3 Chondrites, Samples, Meteorite, Diamonds, Samples, Extraterrestrial, Origin, Formation, Pressure, Graphite, Parent Material, Collisions, Grains, Hypotheses, Photomicrographs, Spectra, Electron Spectroscopy, Laboratory Studies, Procedure, Residue, Carbon

Scientific paper

The C-delta component of the Allende meteorite is a microscopic diamond some of whose properties seem in conflict with those expected of diamond. High spatial resolution analytical data are presented here which may help explain such results. Surface and interfacial carbon atoms in the component, which may comprise as much as 25 percent of the total, impart an 'amorphous' character to some spectral data. These data support the proposed high-pressure conversion of amorphous carbon and graphite into diamonds due to grain-grain collisions in the ISM, although a low-pressure mechanism of formation cannot be ruled out.

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