The variation of the second-order elastic constants (SOECs) and the longitudinal and shear modulii with hydrostatic pressure for the lead fluoride (PbF2) has been investigated for the first time by means of a three-body force potential (TBP) model. The significance of three-body interactions (TBI) has been clearly demonstrated in reproducing the elastic constant variations and the pressure derivatives of SOECs of PbF2. The equation of state for this crystal has also been reported.
KeywordsFluorite anharmonic three-body interactions Cauchy discrepancy
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- Bedi S S and Verma M P 1979Phys. Status Solidi B94 294Google Scholar
- Bedi S S and Verma M P 1982Phys. Status Solidi A97 203Google Scholar
- Gupta O P, Goyal R P, Adhikari R S and Gupta B R K 1987Nuovo Cimento D9 1937Google Scholar
- Palchoudhari S and Bichile G K 1987J. Mater. Sci. Lett. 6 856Google Scholar
- Pauling P 1960The nature of chemical bond (Ithaca: Cornell Univ. Press)Google Scholar
- Tosi M P 1964Solid State Phys. 16 1Google Scholar