综合单斜晶(B 类型) Y 分阶段执行 2 O 3 被调查了由在 situ 在直到在房间温度的 44 GPa 的一个钻石铁砧房间的角度散的 X 光衍射。阶段转变发生从单斜晶(B 类型) 到六角形(A 类型) 在 23.5 GPa 分阶段执行,这二个阶段甚至在最高的压力共存。状态的等温的方程的参数是 ?3, GPa,(修理) 为 B 类型阶段并且 ?3, GPa,(修理) 为 A 类型阶段。结构的 anisotropy 与为两个阶段增加压力增加。
The synthesized monoclinic(B-type) phase of Y2O3 has been investigated by in situ angle-dispersive x-ray diffraction in a diamond anvil cell up to 44 GPa at room temperature. A phase transition occurs from monoclinic(B-type) to hexagonal(A-type) phase at 23.5 GPa and these two phases coexist even at the highest pressure. Parameters of isothermal equation of state are V0= 69.0(1)A3, K0= 159(3) GPa, K0= 4(fixed) for the B-type phase and V0= 67.8(2) A3, K0= 156(3) GPa,K'0= 4fixed for the A-type phase. The structural anisotropy increases with increasing pressure for both phases.