Alkaline, Lanthanoid, Energy level diagram, Orthorhombic

• Ce-Er-O-Sr-Yb
• Ce-Er-O-Sr
• Bi-Ca-Eu-O-Ti
• Ca-Ce-O-Sc
• Ce-O-Sr-Tm-Yb
• rare earth
• lanthanoid
• alkaline
• chalcogen
• luminescent