Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 113, Issue 3, Pages 779-785Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp807996h
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Funding
- Russian Academy of Sciences
- Russian Foundation for Basic Research [05-02-17733, 08-02-00846]
- Foundation for Support of Russian Science
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Using a volumetric technique, a T-P diagram of phase transformations between the hydrogen-rich clathrate hydrate (sII phase), hydrogen-filled ice II (C(1) phase), and the liquid (L) is studied in the H(2)O-H(2) system at pressures up to 4.7 kbar and temperatures from -22 to +15 degrees C. The volume and entropy effects of these transformations are established in the vicinity of the triple point of the L + sII + C(1) equilibrium located at P = 3.6(1) kbar and T = + 1(1) degrees C. The estimated molar ratios H(2)/H(2)O of phases at the triple point are X(L) = 0.04(2), X(SII) = 0.32(2), and X(c1) = 0.10(2).
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