Alkali, Lanthanoid, Photoluminescence spectra, Tetragonal

• Eu-Li-Mo-O
• Eu-Na-O-W
• Eu-Mo-Na-O
• Eu-Gd-Mo-Na-O
• Ca-Eu-Li-O-Si
• rare earth
• lanthanoid
• alkali
• luminescent
• chalcogen