1967/02/24 by R. E. Hanneman, H. M. Strong, F. P. Bundy · 222 citations
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · Chemistry · #High-pressure geophysics and materials #Diamond and Carbon-based Materials Research #Astro and Planetary Science #Meteorite #Diamond #Hexagonal crystal system #Graphite #Carbon fibers #Shock metamorphism #Materials science #Astrobiology #Geology #Crystallography #Mineralogy #Chemistry #Metallurgy #Physics #Composite material #Composite number
paper · doi:10.1126/science.155.3765.995
published in Science 155(3765), 995-997 (American Association for the Advancement of Science)
openalex publication_date 1967/02/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.