Equations of state of ice VI and ice VII at high pressure and high temperature

Journal Article · Sun Sep 14 04:00:00 EDT 2014 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4894421· OSTI ID:22308383

Bezacier, Lucile; Hanfland, Michael ^[1]; Journaux, Baptiste; Perrillat, Jean-Philippe; Cardon, Hervé; Daniel, Isabelle ^[2]

---

1. European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38000 Grenoble (France)
2. Laboratoire de Géologie de Lyon, UMR 5276 CNRS, Ecole Normale Supérieure de Lyon – Université Claude Bernard Lyon 1, 2 rue Raphael Dubois, 69622 Villeurbanne Cedex (France)

High-pressure H{sub 2}O polymorphs among which ice VI and ice VII are abundant in the interiors of large icy satellites and exo-planets. Knowledge of the elastic properties of these pure H{sub 2}O ices at high-temperature and high-pressure is thus crucial to decipher the internal structure of icy bodies. In this study we assess for the first time the pressure-volume-temperature (PVT) relations of both polycrystalline pure ice VI and ice VII at high pressures and temperatures from 1 to 9 GPa and 300 to 450 K, respectively, by using in situ synchrotron X-ray diffraction. The PVT data are adjusted to a second-order Birch-Murnaghan equation of state and give V{sub 0} = 14.17(2) cm{sup 3} mol{sup −1}, K{sub 0} = 14.05(23) GPa, and α{sub 0} = 14.6(14) × 10{sup −5} K{sup −1} for ice VI and V{sub 0} = 12.49(1) cm{sup 3} mol{sup −1}, K{sub 0} = 20.15(16) GPa, and α{sub 0} = 11.6(5) × 10{sup −5} K{sup −1} for ice VII.

• OSTI ID: 22308383
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 10 Vol. 141; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ELASTICITY
EQUATIONS OF STATE
ICE
POLYCRYSTALS
PRESSURE RANGE GIGA PA
TEMPERATURE RANGE 0400-1000 K
WATER
X-RAY DIFFRACTION