Abstract
THERE have very recently been two recalculations of the graphite–diamond equilibrium, one by Liljeblad1 and the other by Berman and Simon2, who also included a brief historical survey. Liljeblad did not make use of the most recent experimental data, whereas in the second paper the latest published material was incorporated as well as new measurements of the expansion coefficient of diamond, made by one of us (J. T.). Fig. 1 shows the two calculated equilibrium curves; while Liljeblad's curve goes through a maximum of about 62,000 atm. near 3,000° K., Berman and Simon arrived at a linear extrapolation above 1,200° K., which follows the equation: P (atm.) = 7,000 + 27 T (°K.)
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References
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BERMAN, R., THEWLIS, J. The Graphite–Diamond Equilibrium. Nature 176, 834–836 (1955). https://doi.org/10.1038/176834b0
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DOI: https://doi.org/10.1038/176834b0
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