Li Hui, Li Nana, Zhu Pinwen, Wang Xin
College of Science, Guangxi University for Nationalities Nanning 530006 China.
State Key Laboratory of Superhard Materials, Jilin University Changchun 130012 China
RSC Adv. 2020 Mar 12;10(18):10540-10545. doi: 10.1039/c9ra10428c. eCollection 2020 Mar 11.
Two polymorphs of polycrystalline HoGeO, one with tetragonal structure and the other with cubic structure, were synthesized by using different methods. The structural stabilities of these two polymorphs under high pressure were investigated by angle-dispersive X-ray diffraction (ADXRD). Pressure-induced amorphization was found in the tetragonal HoGeO, which is suggested to be associated with the breaking-up of long chains of the edge-shared polyhedron group HoO. By contrast, cubic HoGeO is stable at high pressures up to 33.3 GPa.
通过不同方法合成了多晶 HoGeO 的两种多晶型物，一种具有四方结构，另一种具有立方结构。利用角散射 X 射线衍射（ADXRD）研究了这两种多晶型物在高压下的结构稳定性。在四方 HoGeO 中发现了压力诱导非晶化现象，这被认为与边共享多面体基团 HoO 的长链断裂有关。相比之下，立方 HoGeO 在高达 33.3 GPa 的高压下是稳定的。
