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The Anderson Parameter and Temperature Dependence of Bulk Modulus for Alkali Halide Crystals
Author(s) -
Shanker J.,
Singh K.
Publication year - 1981
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.2221030115
Subject(s) - halide , thermodynamics , bulk modulus , adiabatic process , alkali metal , isothermal process , moduli , atmospheric temperature range , materials science , modulus , volume (thermodynamics) , condensed matter physics , chemistry , physics , quantum mechanics , inorganic chemistry , composite material , organic chemistry
The relation is studied between the Anderson parameter δ and the temperature dependence of the bulk modulus for 16 alkali halides with NaCl structure. Two Anderson parameters δ S and δ T are considered, corresponding to the adiabatic and isothermal bulk moduli, B S and B T , respectively. It is found that the assumption δ S ≈ δ T taken by several previous workers is not correct. The difference between δ S and δ T arises largely due to difference between the temperature derivatives of B S and B T at fixed volume. An analysis of the volume dependence of the bulk modulus is performed in terms of interionic potentials. Values of δ S and δ T are calculated using seven different potential forms for the short‐range repulsive energy.