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引用次数: 5
摘要
半导体化合物Sc2S3的带轴结构图像显示了未占用阳离子位置的有序排列，这导致了三维NaCl (B1, ScS)结构的超晶格。实验图像通过多层计算得到了较好的模拟效果。电子束辐照对晶体造成损伤，图像变化复杂。在晶格图像和衍射图中直接观察到明显的结构变化。其中一些类似于被认为生长在其中的无序，它由结构板的系统位移引起的反相边界组成。(单晶:a = 10.376 (2)， b = 7.3775 (9)， c = 22.033 (6) a)
An Electron Microscope Examination of Scandium Sesquisulphide, Sc2S3, and Its Mode of Disordering in the Electron Beam
zone-axis structure images of the semiconductor compound Sc2S3 show the ordered arrangement of the unoccupied cation positions, which gives rise to a superlattice of the NaCl (B1, ScS) structure in three dimensions. The experimental images are adequately simulated by multislice computations. Electron-beam irradiation damages the crystal and the image changes in a complex way. Significant structural changes were directly observed in lattice images and diffraction patterns. Some of this resembles the disorder, believed to be grown in, which consists of antiphase boundaries resulting from the systematic displace- ment of slabs of structure. (For single crystal: a = 10.376 (2), b = 7.3775 (9), c = 22.033 (6) A.)
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