Alkali, Chalcogen, Transitional, Luminescence, Trigonal

• Ba-Eu-K-O-Sm-W
• Ge-Mn-O-Rb
• Ho-Li-O-Ta
• Ca-Mg-Mn-Na-O-P
• Bi-Na-O-Pr-Ti
• photoluminescence spectra
• wavelength for luminescence
• values of luminescence
• luminescence lifetime
• chromaticity diagram
• transitional
• chalcogen
• alkali
• luminescent
• rare earth