Dopant aggregation and precipitation in alkali halides doped with divalent ions J. Corish, J.M. Quigley, C. R. A. Catlow et P.W.M. Jacobs J. Phys. Colloques, 41 C6 (1980) C6-68-C6-71 DOI: 10.1051/jphyscol:1980618