
%0 Journal Article
%A Mair, SL 
%T Symmetry of Terms in the Temperature Factor for Bragg Diffraction of X Rays or Neutrons
%J Australian Journal of Physics
%D 1985/06/01
%V 38
%N 3
%P 421-426
%K 
%R https://doi.org/10.1071/PH850421
%U https://www.publish.csiro.au/paper/PH850421 
%X Terms in the anharmonic Debye-Waller factor, taken as a perturbation about the harmonic case to second order in the van Hove ordering parameter, are classified according to the point-group symmetry of the vibrating atom. The classification is valid for a fully interacting (many-body) crystal potential. It is pointed out that certain terms, which are symmetry-allowed for such a general crystal potential, are excluded if an effective one-particle potential is employed. 
