期刊
AMERICAN MINERALOGIST
卷 94, 期 10, 页码 1388-1391出版社
MINERALOGICAL SOC AMER
DOI: 10.2138/am.2009.3160
关键词
gamma-Ca-3(PO4)(2); equation of state; synchrotron X-ray diffraction; high pressure
资金
- Natural Sciences and Engineering Research Council of Canada
- NSF of China [40821002, 40872033]
The gamma-tricalcium phosphate phase (gamma-TCP), gamma-Ca-3(PO4)(2), is a high-pressure polymorph of tricalcium phosphate with a potential important implication as the reservoir of rare-earth elements and very large lithophile elements in the deep mantle. In situ synchrotron X-ray diffraction measurements of the gamma-TCP phase have been carried out using a diamond-anvil cell to 40.29 GPa at room temperature, with a methanol-ethanol mixture as the pressure medium. The pressures in the measurements have been determined by using gold metal as the internal pressure calibrant. The third-order Birch-Murnaghan equation of state fitted to the experimentally defined unit-cell parameters suggests for the gamma-TCP phase a density of rho(0) = 3.46 1 (1) g/cm(3), an isothermal bulk modulus of K-T = 100.2(13) GPa, and first pressure derivative of K-T' = 5.48(16). When K-T' is fixed at 4, the derived K-T is 113.1(12) GPa.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据