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Inelastic Neutron Scattering by Cerium Hydrides. II. Lattice Dynamical Approach
Author(s) -
Vorderwisch P.,
Hautecler S.,
Deckers H.
Publication year - 1974
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.2220650115
Subject(s) - cerium , inelastic neutron scattering , lattice constant , inelastic scattering , neutron scattering , neutron , lattice (music) , force constant , chemistry , scattering , atomic physics , physics , condensed matter physics , molecular physics , nuclear physics , molecule , inorganic chemistry , quantum mechanics , diffraction , acoustics
A central force lattice dynamical model, previously applied by Slaggie to the CaF 2 structure of ZrH 2 , is extended to the BiF 3 structure. It is used for the analysis of inelastic neutron scattering data on cerium hydrides CeH 1.98 and CeH 2.72 . For both samples the force constants are derived. The values of the corresponding force constants in both hydrides are different. The additional hydrogen in the CeH 2 structure is found to be weakly bound.