Melting of diamond at high pressure

Details Melting of diamond at high pressure Melting of diamond at high pressure

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990sci...250.1547g&link_type=abstract

Science (ISSN 0036-8075), vol. 250, Dec. 14, 1990, p. 1547-1549. Research sponsored by MPI.

Astronomy and Astrophysics

Astrophysics

32

Diamonds, High Pressure, Melting, Molecular Physics, Phase Diagrams, Astrophysics, Carbon, Germanium, Liquid Phases, Silicon

Scientific paper

Melting of diamond at high pressure and the properties of liquid carbon at pressures greater than 1 megabar were investigated with a first-principles molecular dynamics technique. The results indicate an increase of the diamond melting temperature with pressure, which is opposite to the behavior of silicon and germanium. This is contrary to long-held assumptions, but agrees with recent experiments, and has important implications for geology and astrophysics. As is the case for the solid phase of carbon at low temperature, which changes greatly with pressure from graphite to diamond, the structural and bonding properties of liquid carbon vary strongly with pressure.

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