Doppler broadening methods were used to study the nature of vacancy-type defects. The results of annealing at temperatures ranging from 300 to 600K indicated a decrease, in vacancy concentration, which was attributed to the diffusion of Hg vacancies to the surface. Further annealing caused changes in the material structure as Hg and Te were lost from the samples.

C.Smith, P.Rice-Evans, N.Shaw, D.L.Smith: Materials Science Forum, 1992, 105-110, 1233-6