VII^th Symposium on the Physics and Chemistry of Ice

J. Phys. Colloques 48 (1987) C1-435-C1-440
DOI: 10.1051/jphyscol:1987160

PHASE TRANSITIONS OF ICE V AND VI

Y.P. HANDA, D.D. KLUG et E. WHALLEY

Division of Chemistry, National Research Council of Canada, Ottawa, Ontario, K1A OR9, Canada

Résumé
Les transitions de phase de la glace V et VI dans le domaine 90-175 K ont été étudiées par calorimétrie. Les transitions dans le domaine 105-140 K qui sont semblables à des transitions ordre-désordre, ont été identifiées. Les variations d'enthalpie de celles-ci ainsi que les transformations des glaces V et VI en glace I_c à plus hautes températures ont été déterminées.

Abstract
Phase transitions of ice V and VI in the range 90-175 K have been investigated by heat-flow calorimetry. Transitions in the range 105-140 K, which are likely order-disorder, have been identified and enthalpy changes of these and the transformations of ice V and VI to ice I_c at higher temperatures have been determined.

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