Alkali, Bi-Na-O-Ti, Optical properties, Trigonal

• Bi-Na-Nd-O-Ti
• Bi-Er-Na-O-Ti
• Bi-Na-O-Pr-Ti
• Bi-Dy-Na-O-Ti
• phonons
• luminescence
• wavelength for luminescence
• Raman spectra
• wavenumber of optical phonon
• transitional
• pnictogen
• chalcogen
• alkali
• oxide