THE OPTICAL SPECTRA OF Co2+ IN MgAl2O4 SPINEL P.J. DEREN, W. STREK, B . JEZOWSKA-TRZEBIATOWSKA et I. TRABJERG J. Phys. IV France, 01 C7 (1991) C7-279-C7-283 DOI: 10.1051/jp4:1991776