Structural, electronic and optical properties of fluorite-type compoundsR. Khenata, B. Daoudi, M. Sahnoun, H. Baltache, M. Rérat, A. H. Reshak, B. Bouhafs, H. Abid and M. DrizEur. Phys. J. B, 47 1 (2005) 63-70DOI: https://doi.org/10.1140/epjb/e2005-00301-6