Bulg. J. Phys. vol.37 no.2 (2010), pp. 115-122



Higher Order Elastic Constants of Thorium Monochalcogenides

K.M. Raju
Department of Physics, Brahmanand P.G. College, Rath (Hamirpur), Uttar Pradesh, 210 431, India
Abstract. We have predicted the anharmonic elastic properties of thorium chalcogenides (ThS and ThSe) having NaCl-type structure under high temperature (100-1000 K) using Born-Mayer repulsive potentials and the long- and short-range interaction approach. Taking the nearest neighbour distance and hardness parameter as the input data second and third order elastic constants were computed at various temperatures. The significance of these properties in predicting the elastic behavoiur of Th compounds has been discussed.

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