Chalcogen, Luminescent, Rare earth, Photoluminescence spectra

• Al-Ce-O-Y
• Eu-O-Y
• Eu-O-Si-Sr
• Ca-Eu-Mo-O
• Al-Eu-O-Sr
• luminescent
• chalcogen
• rare earth
• lanthanoid
• transitional
• monoclinic
• tetragonal
• orthorhombic
• cubic
• trigonal