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Thermal Effects on Thermophysical Properties of Alkali Cyanide Crystals
Author(s) -
Chauhan S. K. S.,
Agrawal R.,
Pathak P. C.,
Gupta B. R. K.,
Goyal R. P.
Publication year - 1988
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.2221460107
Subject(s) - thermoelastic damping , thermodynamics , alkali metal , cyanide , atmospheric temperature range , phonon , materials science , thermal , range (aeronautics) , lattice vibration , lattice (music) , chemistry , condensed matter physics , inorganic chemistry , organic chemistry , physics , acoustics , composite material
An interionic lattice potential is developed on the basis of phonon‐pressure theory. This interionic potential is used to investigate the thermodynamic and thermoelastic properties of NaCN, KCN, and RbCN crystals. Thermal contribution is taken into account within the framework of HZ type short range overlap interactions, effective upto second neighbour ions. Cohesive energy and six distinct values of third order elastic constants (TOEC) for these crystals are calculated at both temperatures 0 and 300 K. Values of pressure and temperature derivatives of SOEC are also calculated corresponding to both temperatures. The results are discussed and compared with the available experimental data.