title: Determination of the phase diagram of water and investigation of the electrical transport properties of ices VI and VII.
abstract: The phase diagram of water near the ice VI-ice VII-liquid triple point and electrical transport properties of these ices have been studied by in situ electrical conductivity measurements in a diamond anvil cell. The obtained phase boundary between ices VI and VII and the melting curve for these ices are in accord with most previous results. The different properties and amount of orientational defects in ice VI and ice VII are associated with abrupt changes in conductivity when a phase transition from ice VI to ice VII occurs. The electrical transport mechanisms of these two ice polymorphs can be understood in terms of the conduction of the already existing ions and Bjerrum defects.
authors.affiliation: College of Science, Northeast Dianli University, No 169 Changchun Road, Jilin 132012, China. liubao@mail.nedu.edu.cn
authors.forename: Bao
authors.initials: B
authors.lastname: Liu
authors.forename: Jie
authors.initials: J
authors.lastname: Yang
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Wang
authors.forename: Yonghao
authors.initials: Y
authors.lastname: Han
authors.forename: Yanzhang
authors.initials: Y
authors.lastname: Ma
authors.forename: Chunxiao
authors.initials: C
authors.lastname: Gao