Alkaline, Rare earth, Transitional, Optical properties, Trigonal

• La-Mn-O-Sr
• Co-La-Mn-O-Sr
• Ca-Eu-O-P-Zr
• Ca-Eu-O-V
• Ba-Co-La-O
• luminescence
• phonons
• wavelength for luminescence
• photoluminescence spectra
• optical spectra
• transitional
• alkaline
• rare earth
• chalcogen
• lanthanoid