LATTICE DYNAMICAL CALCULATIONS ON COMPOUNDS CRYSTALLIZING IN A THIOGALLATE-TYPE STRUCTURE

Lattice dynamical calculations for thiogallate-type compounds AGa(2)X(4) with A = Cd or Hg, and X = S or Se have been performed on the basis of a short-range force constant model. Discrepancies in the experimental frequencies and crystal structures reported for these compounds in the literature by different groups are discussed with respect to the short-range force constants and potential energy distributions resulting from our calculations. (C) 1995 Academic Press, Inc.