Very dilute (about 1012/cm3) In donors in powder samples were investigated by means of 111In perturbed angular correlation spectroscopy. Most of the In atoms were located in un-complexed sites, but could form weakly-bound complexes with native defects in highly defective material. The In could pair with a Zn vacancy or with another (unidentified) defect. These complexes formed in material which contained large concentrations of both free Zn vacancies, and complexes of Zn vacancies with other defects.

J.W.Griffith, R.Lundquist, R.Platzer, J.A.Gardner, G.Karczewski, J.K.Furdyna: Materials Science Forum, 1994, 143-147, 405-10