Energy level diagram, Lanthanoid, Rare earth, Orthorhombic

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