中文摘要：

采用同步辐射光源和金刚石对顶砧（DAC）技术,对透视石进行了室温下的原位高压单晶X射线衍射研究。实验的最高压力为11.7 GPa,在实验压力范围内,未观察到透视石发生相变。随着压力的升高,晶胞体积逐步被压缩,体积压缩率符合三阶Birch-Murnaghan状态方程,拟合获得体模量K0为114.6（5.3）GPa。压力低于9.3 GPa时,c轴的压缩率大于a轴;在9.3-11.7 GPa压力范围内,限制于透视石结构中的水分子在高压下会阻碍硅氧四面体六元环沿c轴方向的扭曲变形,导致c轴的抗压性增强,最终a轴与c轴的被压缩程度趋于一致。通过分析多种含水环状硅酸盐矿物的高压行为,发现高压下结构中水的存在形式对含水环状硅酸盐矿物的弹性性质有重要的影响。

英文摘要：

In-situ high pressure single-crystal X-ray diffraction investigation of dioptase was carried out at room temperature using diamond anvil cells（ DAC） with synchrotron radiation source. No phase transition of dioptase was observed up to the highest pressure of 11. 7 GPa. The results obtained from single-crystal X-ray diffraction between10- 4and 11. 7 GPa reveal volume decreasing as a function of pressure, corresponding to K0= 114. 6 ± 5. 3 GPa for the bulk modulus and K＇ = 2. 7 ± 0. 8 for its pressure derivative for a third-order Birch-Murnaghan equation of state.When pressure is lower than 9. 3 GPa, c-axial compressibility is larger than that of a-axis; in the pressure range of9. 3 - 11. 7 GPa, water molecules in the structure of dioptase will produce strong compression of rings of six silicate tetrahedra under high pressure, causing the reduction of c-axial compressibility, and eventually the degree of a-axis compression is nearly the same as that of c-axis at 11. 7 GPa. By analyzing high pressure behavior of many aqueous annular silicate minerals, the authors have come to the conclusion that the form of water molecules plays a key role in the elasticity of aqueous annular silicate minerals.