Abstract
Considering contributions of the cubic and other higher order anharmonic terms in the potential energy function, a new equation for the thermal expansion coefficient, α, for ionic solids has been derived. It has been shown that all the equations derived by earlier workers are either one or the other special case of this equation. The present equation has been applied to some face-centred cubic, body-centred cubic and zinc-blende structure types of ionic crystals to compute the values of α on the basis of Born—Mayer interaction potential function and on comparison with the experimental values of α a satisfactory agreement has been found.
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The work was done at the Indian Institute of Technology, Kanpur, India.
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Srivastava, S.P. Thermal expansion coefficient of ionic crystals— An interatomic potential approach. Acta Physica 52, 31–37 (1982). https://doi.org/10.1007/BF03156203
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DOI: https://doi.org/10.1007/BF03156203