Isothermal Anderson-Gruneisen Parameter δT of Alkali Halide Crystals

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  • Pande M. K.
    Solid State Physics Laboratory, Department of Physics, Lucknow University
  • Gupta C. L.
    Solid State Physics Laboratory, Department of Physics, Lucknow University
  • Sharma R. R.
    Solid State Physics Laboratory, Department of Physics, Lucknow University
  • Sharma M. N.
    Solid State Physics Laboratory, Department of Physics, Lucknow University

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  • Isothermal Anderson-Grüneisen Parameter δ<SUB>T</SUB> of Alkali Halide Crystals
  • Isothermal Anderson Gruneisen Parameter

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The isothermal Anderson-Grüneisen parameter δT has been studied with the help of interaction approach. The necessary equation for δT has been derived interms of various lattice properties and tested for some cubic crystals, on the basis of wellknown Born, Lennard-Jones (12 : 6) and modified Varshni-Shukla potential energy functions. The potential parameters of these models have been calculated employing the lattice equilibrium conditions at hydrostatic pressure instead of the generally utilised equilibrium lattice conditions at atmospheric pressure (p=0). The results have been discussed in detail and it is inferred that the computed values of δT, except for the Lennard-Jones function, are quite satisfactory with the experimental values keeping in view the limitations involved in the present treatment, which is obviously based on the least possible approximations.

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