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

• H-K-O-P
• Bi-Na-O-W
• K-O-V
• Fe-K-Se
• B-Cu-Li-O
• phonons
• luminescence
• non-linear optics
• Raman spectra
• wavenumber of optical phonon
• alkali
• non-disordered
• chalcogen
• transitional
• nonmetal