Alkali, Transitional, Optical properties, Tetragonal

• Fe-K-Se
• As-Fe-Li
• As-Ba-Fe-K
• Bi-Na-O-W
• K-O-V
• phonons
• luminescence
• optical spectra
• Raman spectra
• photoluminescence spectra
• transitional
• alkali
• chalcogen
• disordered
• nonmetal