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Birch Equation of State for Alkali Halide Crystals
Author(s) -
Thomas L. M.,
Shanker J.
Publication year - 1994
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.2221810214
Subject(s) - halide , alkali metal , equation of state , bulk modulus , thermodynamics , phase (matter) , compression (physics) , derivative (finance) , volume (thermodynamics) , chemistry , materials science , analytical chemistry (journal) , mineralogy , inorganic chemistry , physics , organic chemistry , financial economics , economics
The Birch equation of state (BES) derived from the theory of finite strain is used to calculate the pressure versus volume compression data at room temperature for eleven alkali halide crystals, viz. LiF, LiCl, LiBr, LiI, NaF, NaCl, NaBr, NaI, CsCl, CsBr, and CsI. These crystals can be compressed to rather high pressures without appearance of any structural phase transformation. The parameters of BES are determined from the ultrasonically measured experimental values of the bulk modulus and its first pressure derivative and the calculated values of second pressure derivative of bulk modulus derived from interionic potential models. The resulting P‐V data for all the crystals compare well with the corresponding experimental values reported by Vaidya and Kennedy and by Yagi.