Laser-induced time-resolved luminescence of natural sillimanite, Al2SiO5, and artificial Al2SiO5 activated by chromium

M. Gaft M, L. Nagli

Laser Distance Spectrometry Company, Petach Tikva, Israel

W. Strek, L Marciniak

Institute for Low Temperature and Structure Research, Polish Academy of Sciences, Wroclaw, Poland

G. Panczer

Physical Chemistry of Luminenescence Materials Laboratory, Lyon 1 University, Villeurbanne, France

Rossman GR

Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA


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.