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

被引：55

作者：

Bezacier, Lucile ^{[1
]}

Journaux, Baptiste ^{[2
]}

Perrillat, Jean-Philippe ^{[2
]}

Cardon, Herve ^{[2
]}

Hanfland, Michael ^{[1
]}

Daniel, Isabelle ^{[2
]}

机构：

[1] European Synchrotron Radiat Facil, F-38000 Grenoble, France

[2] Univ Lyon 1, CNRS, UMR 5276, Lab Geol Lyon,Ecole Normale Super Lyon, F-69622 Villeurbanne, France

来源：

JOURNAL OF CHEMICAL PHYSICS | 2014年 / 141卷 / 10期

关键词：

X-RAY-DIFFRACTION; OF-STATE; MELTING CURVE; PHASE-DIAGRAM; THERMAL EXPANSIVITY; NACL-H2O SYSTEM; SINGLE-CRYSTAL; BULK MODULUS; SHOCK-WAVE; GPA;

D O I：

10.1063/1.4894421

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

High-pressure H2O 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 H2O 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-0 = 14.17(2) cm(3) mol(-1), K-0 = 14.05(23) GPa, and alpha(0) = 14.6(14) x 10(-5) K-1 for ice VI and V-0 = 12.49(1) cm(3) mol(-1), K-0 = 20.15(16) GPa, and alpha(0) = 11.6(5) x 10(-5) K-1 for ice VII. (c) 2014 AIP Publishing LLC.

引用

页数：6

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