Chalcogen, Nonmetal, Hexagonal, Photoluminescence spectra

• Al-Eu-N-O-Si
• Al-Ba-Eu-Mg-O
• Cd-Se
• Ba-Cl-Eu-Gd-O-P
• Ba-Cl-Eu-La-O-P
• chalcogen
• nonmetal
• luminescent
• rare earth
• lanthanoid