Alkaline, Disordered, Rare earth, Optical properties, Trigonal

• La-Mn-O-Sr
• Ca-Eu-O-P
• Co-La-Mn-O-Sr
• Ca-Eu-Mg-Na-O-P
• Ca-Eu-O-P-Zr
• luminescence
• photoluminescence spectra
• wavelength for luminescence
• phonons
• optical spectra
• rare earth
• disordered
• alkaline
• lanthanoid
• chalcogen