Monoclinic LaGa1−xMnxGe2O7: a new blue chromophore based on Mn3+ in the trigonal bipyramidal coordination with longer apical bond lengths

Abstract

New blue inorganic oxide materials LaGa_1−xMn_xGe₂O₇ are developed by a solid state reaction method. Substitution of Mn³⁺ in LaGaGe₂O₇ changes the color from white (x = 0) to blue (x = 0.1–0.4). The blue color is due to the absorption in the energy region of 1.7–2.5 eV.