Phase Diagram of Ammonium Fluoride to 20 kbar (original) (raw)
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Research Article| March 01 1968
Division of Applied Chemistry, National Research Council, Ottawa, Canada
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Division of Applied Chemistry, National Research Council, Ottawa, Canada
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J. Chem. Phys. 48, 2025–2031 (1968)
The phase boundaries and the transition volumes of ammonium fluoride in the range 1 to 20 kbar and 20° to 340°C have been measured, and the transition entropies calculated. A new phase is reported, designated IV, that has an entropy about Rln6 greater than that of its neighbors I and II. This entropy difference suggests that the ammonium ions in phase IV are orientationally disordered among six equivalent positions. The liquid‐I boundary shows that the liquid is mainly ionic.
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© 1968 American Institute of Physics.
1968
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