热膨胀
正交晶系
熔点
材料科学
格子(音乐)
结晶学
衍射
熔化温度
晶格常数
热的
晶体结构
凝聚态物理
热力学
化学
复合材料
光学
物理
声学
作者
H. Wiedemeier,P. A. Siemers
标识
DOI:10.1002/zaac.19754110110
摘要
Abstract The thermal expansion of GeSe has been studied above room temperature up to the melting point of 670 ± 5°C by X‐ray diffraction techniques using a 190 mm Unicam high temperature camera. The thermal expansion of the crystallographic axes is linear with a distinct change of the expansion coeffients for all axes above 400°C. The relative changes of the axes indicate a rearrangement of the structure towards cubic symmetry with increasing temperature. The transformation of GeSe from the orthorhombic to a normal NaCl‐type structure is observed at 651 ± 5°C. The lattice parameter of the cubic form of GeSe is a 0 = 5.730 ± 0.003 Å at 656°C. The GeSe lattice remains cubic up to the melting point.
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