Alkaline, Chalcogen, Orthorhombic, Wavelength for luminescence

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