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February 24, 1967Science

Hexagonal Diamonds in Meteorites: Implications

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Authors

RHR. E. HannemanPurdue University West LafayetteHSH. M. StrongThe Nature ConservancyFBF. P. BundyThe Nature Conservancy

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Implication

Mineralogical analysis reveals hexagonal diamond in meteorites, indicating shock pressures converted preexisting graphite during impact.

Key Points

  • Determine the structural characteristics and formation mechanism of newly discovered diamond phases within meteorites.
  • Examined carbon phases present within the Canyon Diablo and Goalpara meteorites.
  • Compared meteoritic carbon crystal structures to synthetic hexagonal diamond phases prepared under controlled laboratory high-pressure conditions.
  • Identified hexagonal diamond, a previously synthesized carbon polymorph, occurring naturally in Canyon Diablo and Goalpara meteorites.
  • Demonstrated that meteoritic diamonds formed when extreme shock pressures transformed pre-impact crystalline graphite inclusions, refuting the hypothesis of static growth and subsequent breakup.

Cite This Study

Hanneman et al. (1967) studied this question.

synapsesocial.com/papers/69dc357f3080d3567e274a6ehttps://doi.org/10.1126/science.155.3765.995
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Hexagonal Diamond—A New Form of Carbon1967 · 718 citations
  2. 2Diamond-Graphite Equilibrium Line from Growth and Graphitization of Diamond1961 · 304 citations
  3. 3Formation of Diamond by Explosive Shock1961 · 476 citations
  4. 4Diamonds, Meteorites, and the Origin of the Solar System.1956 · 162 citations
  5. 5Canyon Diablo meteorite: Metallographic and mass spectrometric study of 56 fragments1966 · 122 citations