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Figure 9
Semi-empirical diagram of energy versus temperature of PR3R, PR3O and PR3Y. G is the Gibbs free energy and H is the enthalpy. R, O and Y represent PR3R, PR3O and PR3Y, respectively. In addition, t.p. is the transition point between the two polymorphs and m.p. is the melting point.

ISSN: 2052-5206
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