B-Eu, Nonmetal, Rare earth, Optical properties

• B-Eu-Gd-O
• B-Eu-Gd-O-Y
• B-Eu-La-O
• B-Eu-O-Sr
• luminescence
• values of luminescence
• photoluminescence spectra
• wavelength for luminescence
• phonons
• rare earth
• metalloid
• nonmetal
• lanthanoid
• chalcogen
• monoclinic
• hexagonal
• orthorhombic
• trigonal
• cubic