Alkali, Optical properties, Trigonal

• Li-Nb-O
• Li-O-Ta
• Bi-Na-O-Ti
• Co-Li-O
• Fe-K-Mo-O
• phonons
• luminescence
• Raman spectra
• optical absorption
• infrared spectra
• alkali
• chalcogen
• transitional
• disordered
• nonmetal