Chalcogen, Luminescent, Transitional, Photoluminescence spectra

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