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Investigation of the Equation of State and the Grüneisen‐Anderson Parameters for Fluorite‐Structure Crystals
Author(s) -
Dutt N.,
Agrawal G. G.,
Shanker J.
Publication year - 1985
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.2221290107
Subject(s) - fluorite , compressibility , thermodynamics , volume (thermodynamics) , equation of state , thermal expansion , compression (physics) , high pressure , materials science , grüneisen parameter , chemistry , physics , metallurgy
Investigations of the equation of state describing the relationship between pressure and volume are presented for seven fluorite‐structure crystals viz., CaF 2 , SrF 2 , BaF 2 , PbF 2 , Sr(NO 3 ) 2 , Ba(NO 3 ) 2 , and Pb(NO 3 ) 2 . Recently developed interionic potentials, which take into account three‐body interactions also, are used for calculating the compression values corresponding to very high pressures. Calculations are also performed for the Grüneisen parameter and its volume derivative, the Anderson parameters, and the volume thermal expansion coefficient. The results are compared with available experimental data and also with those calculated by other workers. The nitrates are found to be much more compressible than the corresponding fluorides under the effect of high pressure.