Energy level diagram, Lanthanoid, Transitional, Orthorhombic

• Bi-Er-Na-O-Ti
• Ga-La-O-Tm-Yb
• Bi-Ca-Eu-O-Ti
• Ca-Ce-O-Sc
• Ba-Ho-O-Y-Yb-Zn
• lanthanoid
• rare earth
• transitional
• chalcogen
• luminescent