ABSTRACT The phase transitions and equation of state measurements were carried out on rare earth metal Holmium (Ho) to 282 GPa using toroidal diamond anvils thereby doubling the pressure range to which it has been studied previously. The first set of experiment employed standard beveled diamond anvils utilizing copper as an x-ray pressure standard to 217 GPa. The second set of experiment employed toroidal diamond anvils utilizing platinum as an x-ray pressure standard to 282 GPa. The recently proposed 16-atom orthorhombic structure (oF16) appeared to be stable between 103 and 282 GPa. The scaled axial ratio (c/a) shows a narrow range of variation of 1.58 ± 0.05 for the five known crystalline phases of Ho to 282 GPa. The experimental equation of state of Ho is presented up to a threefold volume compression V/Vo = 0.322.

中文翻译：

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稀土金属钬静态压缩至 282 GPa

摘要 使用环形金刚石砧在稀土金属钬 (Ho) 上进行了相变和状态方程测量，达到 282 GPa，从而使之前研究的压力范围加倍。第一组实验采用标准斜面金刚石砧，利用铜作为 X 射线压力标准，压力达到 217 GPa。第二组实验采用环形金刚石砧，利用铂作为 X 射线压力标准，压力达到 282 GPa。最近提出的 16 原子正交结构 (oF16) 似乎在 103 到 282 GPa 之间稳定。对于从 Ho 到 282 GPa 的五个已知晶相，缩放轴比 (c/a) 显示出 1.58 ± 0.05 的窄变化范围。Ho 状态的实验方程显示为三倍体积压缩 V/Vo = 0.322。