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Analysis of the Dielectric Behaviour of Alkali Halide Crystals
Author(s) -
Shanker J.,
Sundaraj R.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221010132
Subject(s) - electronegativity , halide , alkali metal , dielectric , materials science , charge (physics) , thermodynamics , effective nuclear charge , chemistry , inorganic chemistry , ion , physics , organic chemistry , quantum mechanics , optoelectronics
An analysis of the dielectric data at low temperature (2 K) and at room temperature (290 K) is performed for the entire family of NaCl and CsCl structure alkali halide crystals. The recent data on dielectric constants and their pressure and temperature derivatives are used to study the nature of some important physical quantities like the energy gap between bonding and anti‐bonding states, the Phillips‐van Vechten electronegativity parameter and the Szigeti effective charge parameter. Some interesting results are obtained using the Penn model for the electronic dielectric constant and the Lawaetz relation between electronegativity and effective charge parameters.