Elastic, Dielectric, and Photoelastic Constants of Alkali Halide Crystals
β Scribed by D. Hans; A. A. S. Sangachin; M. Kumar
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 430 KB
- Volume
- 147
- Category
- Article
- ISSN
- 0370-1972
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π SIMILAR VOLUMES
## Abstract A method for evaluating the temperature dependence of fourthβorder elastic constants (FOEC) of NaCl as well as CsClβstructure alkali halides is developed on the basis of the phononβpressure theory. Eleven distinct values of FOEC for each alkali halide crystal are calculated at 0 K and a
## Abstract The waveβvector dependent dielectric function for LiCl, LiBr, LiI, NaCl, NaBr, Nal, KCl, KBr, and KI is calculated using a model originally proposed by Fry. An approximate analytical expression for the screened Coulomb potential is also given.
## Abstract The dielectric and anharmonic behaviour of alkali halide crystals is studied by determining the volume derivatives of low frequency dielectric constant and polarizability. An interionic force model which takes into account the contributions arising from the short range overlap repulsion