Abstract
Luminescence of natural sillimanite
Al2SiO5 was studied by laser-induced time-resolved
technique combined with absorption spectroscopy. It was found that two red broad
emission bands are connected to Fe3+ and Cr3+ luminescence
centers. Chromium participation in luminescence was proved by the study of
artificial sillimanite activated by Cr. Several narrow emission lines have been
found which were preliminary ascribed to Mn4+ and V2+
luminescence centers.