Science. 1986 Mar 7;231(4742):1136-8. doi: 10.1126/science.231.4742.1136.
X-ray diffraction studies have been carried out on alkali halide samples 10 micrometers in diameter (volume 10(-9) cubic centimeter) subjected to megabar pressures in the diamond anvil cell. Energy-dispersive techniques and a synchrotron source were used. These measurements can be used to detect crystallographic phase transitions. Cesium iodide was subjected to pressures of 95 gigapascals (fractional volume of 46 percent) and rubidium iodide to pressures of 89 gigapascals (fractional volume of 39 percent). Cesium iodide showed a transformation from the cubic B2 phase (cesium chloride structure) to a tetragonal phase and then to an orthorhombic phase, which was stable to 95 gigapascals. Rubidium iodide showed only a transition from the low-pressure cubic B1 phase (sodium chloride structure) to the B2 phase, which was stable up to 89 gigapascals.
已对在金刚石压腔中经受兆巴级压力的直径为 10 微米（体积为 10^(-9) 立方厘米）的碱金属卤化物样品进行了 X 射线衍射研究。使用了能量色散技术和同步辐射源。这些测量可用于检测晶体相转变。碘化铯经受了 950 吉帕斯卡的压力（体积分数为 46%），碘化铷经受了 890 吉帕斯卡的压力（体积分数为 39%）。碘化铯从立方 B2 相（氯化铯结构）转变为四方相，然后转变为正交相，在 950 吉帕斯卡下稳定。碘化铷仅从低压立方 B1 相（氯化钠结构）转变为 B2 相，在 890 吉帕斯卡下稳定。
