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Analysis of Anharmonic Properties of Some Partially Covalent Crystals

✍ Scribed by R. K. Singh; P. Khare

Publisher
John Wiley and Sons
Year
1984
Tongue
English
Weight
433 KB
Volume
124
Category
Article
ISSN
0370-1972

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✦ Synopsis

Abstract

The anharmonic properties of silver, thallium, and copper halides are analysed by means of a new interionic potential model which incorporates theeffects of the long‐range Coulomb and three‐body interactionsand the short‐range van der Waals (vdW) attraction and overlap repulsion extended up to the second‐neighbour ions. The model potential is applied to investigate the third‐order elastic constants and the pressure derivatives of second‐order elastic constants of the crystals. Additively some thermodynamic and thermoelastic behaviours of these solids are calculated. The results agree fairly well with the available experimental data and show a consistent trend throughout.

📜 SIMILAR VOLUMES

The elastic constants of cubic crystals
The elastic constants of cubic crystals with covalent and partially covalent bonds
✍ M. R. Vukcevich 📂 Article 📅 1972 🏛 John Wiley and Sons 🌐 English ⚖ 442 KB

## Abstract General formulae for the elastic constants of purely and partially covalent cubic crystals are derived. For the mixed covalent‐ionic bond a new model of electron locale‐transition is proposed, according to which the ionicity of a bond depends on the bonding angle. This model can account