Jousseaume C.; Vivien D.; Kahn-Harari A.; Malkin B.
(2003)
The diffuse reflectance spectra of Cr:Li2MSiO4, M = Mg, Zn, indicate that in these compounds, chromium ions occur in the 4+, 5+, and 6+ oxidation states simultaneously. Under selective excitation in a Cr 4+ absorption band, ...