Chalcogen, Rare earth, Energy level diagram, Orthorhombic

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