Alkaline, Borate, Chalcogen, Nonmetal, Optical properties, Trigonal

• B-Ba-O
• B-Ba-Na-O
• B-Ba-Eu-Gd-O
• B-O-P-Sr-U
• B-Be-F-O-Sr
• luminescence
• non-linear optics
• photoluminescence spectra
• refractive index
• wavelength for luminescence
• metalloid
• alkaline
• chalcogen
• borate
• nonmetal