Abstract
Analysis of inclusions1 has shown that natural diamond forms at pressures of 5-6 GPa and temperatures in the range 900-1,400 °C. In non-metallic systems2,4, diamond has been synthesized only at pressures greater than 7 GPa and temperatures of more than 1,600 °C. We find that diamond can crystallize in alkaline carbonate-fluid melts at pressures and temperatures that correspond to those of natural diamond formation.
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Pal'yanov, Y., Sokol, A., Borzdov, Y. et al. Diamond formation from mantle carbonate fluids. Nature 400, 417–418 (1999). https://doi.org/10.1038/22678
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DOI: https://doi.org/10.1038/22678
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