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$\begingroup$ "diamonds are thermodynamically unstable compared to graphite" This would be the answer, if true. Any refs? Like this one? en.wikipedia.org/wiki/Material_properties_of_diamond $\endgroup$my2cts– my2cts2026-01-31 17:00:43 +00:00Commented 14 hours ago
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1$\begingroup$ Yeah. Both the enthalpy and extropy favor diamond to graphite transformation $\endgroup$哲煜黄– 哲煜黄2026-01-31 17:59:30 +00:00Commented 13 hours ago
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1$\begingroup$ The Wikipedia link currently contains the sentence "owing to a very large kinetic energy barrier, diamonds are metastable [and] will not decay into graphite under normal conditions," with the citation "Webster, R.; Read, P. G. (2000). Gems: Their sources, descriptions and identification." $\endgroup$rob– rob ♦2026-01-31 18:11:04 +00:00Commented 13 hours ago
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$\begingroup$ I should be more direct. Your premise is false. See the section 'Thermal Stability'. It's only a few lines of text. $\endgroup$my2cts– my2cts2026-01-31 22:27:58 +00:00Commented 9 hours ago
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