Borate, Chalcogen, Optical properties, Trigonal

• B-Ba-O
• B-Ge-La-O
• B-O
• B-Ba-Na-O
• B-Ba-Eu-Gd-O
• luminescence
• phonons
• non-linear optics
• photoluminescence spectra
• infrared spectra
• metalloid
• borate
• chalcogen
• nonmetal
• alkaline