G Raghurama
Articles written in Pramana – Journal of Physics
Volume 21 Issue 5 November 1983 pp 301-309 Solid State Physics
Theory of divalent ions in crystals
The divalent ions in alkaline earth chalcogenides are viewed as compressible objects and are treated within a purely ionic model. As in earlier studies on the alkali and ammonium halides, the ions are taken to be in the form of space-filling polyhedral cells and the compression energy, which is the source of repulsion, is written as a surface integral over the cell faces. A simple method of computing the repulsion energy in any crystal lattice of arbitrary symmetry is proposed and the repulsion parameters
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