Alkaline, Lanthanoid, Luminescent, Rare earth, Photoluminescence spectra

• Eu-O-Si-Sr
• Ca-Eu-Mo-O
• Al-Ba-Eu-Mg-O
• Al-Eu-O-Sr
• Ca-Eu-O-P
• rare earth
• alkaline
• luminescent
• lanthanoid
• chalcogen
• orthorhombic
• monoclinic
• tetragonal
• trigonal
• hexagonal