摘要
使用金刚石对顶砧(DAC,Diamond Anvil Cell)高压装置和同步辐射光源,对黄玉进行原位高压X射线衍射研究,实验最高压力达到29.7GPa。在研究的压力范围内,随着压力的升高,晶胞体积逐渐被压缩,晶胞参数a的压缩率大于c和b。未观察到黄玉的结构相变。利用Murnaghan状态方程(K′=4)对黄玉的体积–压力数据拟合,获得等热体积模量K298为199.7(4.6)GPa。
In situ high-pressure energy dispersive X-ray diffraction experiments on natural topaz have been carried out using diamond anvil cell （DAC） device on Beijing Synchrotron Radiation Facility. The pressure dependence of the lattice parameters of topaz is reported up to 29.7 GPa at room temperature. In the experimental pressure range, no evidence was observed for the phase transition of topaz. The Mumaghan equation of state was used to fit the P-V data, assuming the pressure derivative K′=4, and the isothermal bulk modulus K298 =199.7 （4.6） GPa was obtained.
出处
《核技术》
EI
CAS
CSCD
北大核心
2008年第7期497-500,共4页
Nuclear Techniques
基金
国家自然科学基金(40672024)
中国科学院知识创新重要方向项目(KJCX2-SW-N20)资助
关键词
黄玉
同步辐射
高压
结构
相变
Topaz, Synchrotron radiation, High-pressure, Structure, Phase transition
