Chalcogen, Hexagonal, Photoluminescence spectra

• O-Zn
• Al-Ba-Eu-Mg-O
• Ba-Cl-Eu-O-P
• Al-Ba-Eu-Mg-O-Si
• Ca-Eu-F-O-P
• chalcogen
• luminescent
• rare earth
• lanthanoid
• disordered