Nonmetal, Rare earth, Photoluminescence spectra

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