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Comparative infrared lattice vibration study of LiGaO 2 and LiInO 2 (II). Interatomic force constants
Author(s) -
Neumann H.
Publication year - 1990
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170250610
Subject(s) - force constant , lattice vibration , wurtzite crystal structure , infrared , tetrahedron , chemistry , infrared spectroscopy , bond length , vibration , crystallography , lattice constant , molecular vibration , spectral line , lattice (music) , molecular physics , crystal structure , condensed matter physics , phonon , molecule , physics , optics , organic chemistry , quantum mechanics , astronomy , hexagonal crystal system , diffraction , acoustics
The frequencies of the wurtzite‐like modes due to Li–O and Ga–O bond vibrations in LiGaO 2 and of the rocksalt‐like mode due to Li–O bond vibrations in LiInO 2 are determined from the infrared reflectivity spectra of the compounds. The force constants for the Li–O and Ga–O bonds in LiGaO 2 follow the same trends as those found for the A I B III C 2 VI chalcogenides with tetrahedral cordination. The results for LiInO 2 are compared with measurements on the octahedrally coordinated modification of LiAlO 2 .