Alkaline, Chalcogen, Disordered, Optical properties, Trigonal

• La-Mn-O-Sr
• Ca-Eu-O-P
• Ca-Mn-O
• Li-Mg-Nb-O
• Ca-O-P
• luminescence
• phonons
• photoluminescence spectra
• wavelength for luminescence
• optical spectra
• chalcogen
• disordered
• alkaline
• transitional
• rare earth