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Structural analysis of partially covalent lanthanide and actinide bismuthides with phase‐transition pressures below 14 GPa
Author(s) -
Bhardwaj Purvee,
Singh Sadhna
Publication year - 2012
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.201147042
Subject(s) - lanthanide , actinide , tetragonal crystal system , phase transition , thermodynamics , phase (matter) , materials science , volume (thermodynamics) , chemistry , inorganic chemistry , physics , organic chemistry , ion
In the present article, we have investigated the high‐pressure structural phase transition of lanthanide and actinide bismuthides (LaBi, CeBi, PrBi, CmBi, PuBi and UBi). A modified interaction potential model (MIPM) (including the covalency effect) has been developed. Phase‐transition pressures are associated with a sudden collapse in volume. At compressed volumes, these compounds are found either in tetragonal or CsCl phase. The phase‐transition pressures and associated volume collapses obtained from present potential model show a generally good agreement with available experimental data from others. The elastic constants and their pressure derivatives are also reported. Moreover, the thermodynamical properties have also been obtained successfully. Our results are in general in good agreement with experimental and theoretical data where available, and provide predictions where they are unavailable.