Alkali, Chalcogen, Non-disordered, Optical properties, Trigonal

• Li-Nb-O
• Li-O-Ta
• Co-Li-O
• Fe-K-Mo-O
• Li-Ni-O
• phonons
• luminescence
• infrared spectra
• Raman spectra
• wavenumber of optical phonon
• chalcogen
• alkali
• non-disordered
• transitional
• nonmetal