Science. 1989 Nov 3;246(4930):649-51. doi: 10.1126/science.246.4930.649.
X-ray diffraction measurements have been carried out on cesium iodide (CsI) to 302 gigapascals with a platinum pressure standard. The results indicate that above 200 gigapascals CsI at 300 K has a hexagonal close-packed crystal structure with the ideal c/a ratio of 1.63 +/- 0.01. The crystal structure and pressure-volume relations converge at high pressure with those of solid xenon, which is isoelectronic with CsI. The results indicate a significant loss of ionic bonding in the hexagonal close-packed metallic phase of CsI at ultrahigh pressure.
已用白金压标对碘化铯(CsI)进行了高达 302GPa 的 X 射线衍射测量。结果表明，在 300K 时，高于 200GPa 的碘化铯具有六方密堆积晶体结构，理想的 c/a 比为 1.63 +/- 0.01。在高压下，其晶体结构和体积-压力关系与等电子的固体氙(Xe)趋于一致。结果表明，在超高压力下，碘化铯的六方密堆积金属相中离子键有明显损失。
