Phase diagrams and isotopic effects of normal and deuterated water studied via x-ray diffraction up to 4.5 GPa and 500 K

作者：Weck G^*; Eggert J; Loubeyre P; De**iens N; Bourasseau E; Maillet J B; Mezouar M; Hanfland M

来源：Physical Review B, 2009, 80(18): 180202.

DOI：10.1103/PhysRevB.80.180202

• heavy water
• high-pressure effects
• isotope shifts
• liquid structure
• phase diagrams
• X-ray diffraction

We present synchrotron x-ray measurements in a diamond anvil cell of the molecular structure factor of H(2)O and D(2)O fluids up to 4.5 GPa and 500 K. We observe large changes in the structure factor and a dramatic increase in the oxygen coordination number over a 2 GPa pressure range. A P-T diagram of the nearest-neighbor oxygen coordination number, n(OO), is disclosed. Also, a counterintuitive isotopic shift of the variation of n(OO) with pressure is observed.

• 出版日期2009-11
• 单位中国地震局