【摘要】 采用同步辐射光源和金刚石对顶砧(DAC)技术,对绿柱石进行了室温下的原位高压能散X射线衍射(EDXD)研究,实验的最高压力为19.2 GPa。在实验压力范围内,未观察到绿柱石发生相变,轴压缩率c大于a;在小于9.3 GPa的压力范围内,其体积压缩率符合二阶Murnaghan状态方程,而压力在9.3~19.2 GPa范围内时,其体积压缩率有所增加,且体积-压力关系近乎线性变化。更多还原

【Abstract】 At room temperature,in-situ high-pressure energy dispersive X-ray diffraction(EDXD) inspections on beryl has been carried out using diamond anvil cell(DAC) device with synchrotron radiation source.The maximal pressure in the experiment is 19.2 GPa.In the range of experimental pressure,no evidence for the phase transition of beryl was observed.However,the axial compressibility along c axis is larger than that along a axis.The volume compressibility could be described with Murnaghan equation of state in the range of room pressure to 9.3 GPa,while in 9.3~19.2 GPa,the volume compressibility shifts and increases with pressure in a nearly linear relationship.更多还原