Chalcogen, Transitional, Energy level diagram, Orthorhombic

• Bi-Er-Na-O-Ti
• Ga-La-O-Tm-Yb
• Bi-Ca-Eu-O-Ti
• Ca-Ce-O-Sc
• Ba-Cd-Se-Sn
• chalcogen
• transitional
• rare earth
• lanthanoid
• luminescent