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Title: Semi-quantitative theory of the structures of simple ionic crystals
Authors: Narayan, R.
Keywords: Ionic crystals
Crystal structures
Repulsion potential
van der Waals interactions
Issue Date: Jul-1981
Publisher: Indian Academy of Sciences, Bangalore, India.
Citation: Pramana, 1981, Vol. 17, p13-23.
Abstract: A simple theory is developed which shows that the regions of stability of the CsCl, NaCl and ZnS structures can be demarcated in a two-dimensional plot of the radius ratio versus the strength of the van der Waals interaction. There is good agreement with experiment. The effect of pressure on these structures is explained qualitatively. The increased occurrence of the ZnS structure and the decreased stability of the CsCl structure in the A²¯ B²¯ crystals compared to the A+B¯ crystals is also explained. Finally it is shown that the radius ratio and the polarizabilities of the ions are the important factors that determine the structures of AB2 crystals.
ISSN: 0304-4289
Copyright: Indian Academy of Sciences, Bangalore, India.
Appears in Collections:Research Papers (SCM)

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