Ba-Eu, Hexagonal, Nonmetal, Rare earth

• Al-Ba-Eu-Mg-O
• Ba-Eu-O-Ru
• Ba-Cl-Eu-O-P
• Al-Ba-Eu-N-O-Si-Y
• Ba-Ce-Cl-Eu-O-P
• optical properties
• luminescence
• photoluminescence spectra
• electronic and electrical properties
• values of luminescence
• nonmetal
• rare earth
• alkaline
• lanthanoid
• chalcogen