Alkali, Transitional, Trigonal, Wavelength for luminescence

• Bi-Er-Na-O-Ti
• Ge-Mn-O-Rb
• Bi-Na-O-Sm-Ti
• Bi-Na-Nd-O-Ti
• Ba-Eu-K-O-Sm-W
• transitional
• alkali
• luminescent
• chalcogen
• rare earth