Chalcogen, Lanthanoid, Orthorhombic, Wavelength for luminescence

• O-Sn-Sr-Tb
• Eu-O-Si-Sr
• Ca-Eu-Ge-Li-O
• C-Eu-Na-O
• Ca-Eu-Ge-O
• lanthanoid
• rare earth
• chalcogen
• luminescent
• alkaline