Alkali, Chalcogen, Transitional, Optical properties, Tetragonal

• Fe-K-Se
• Bi-Na-O-W
• K-O-V
• Br-C-H-K-N-O-Pt
• Gd-Na-O-W
• luminescence
• phonons
• wavelength for luminescence
• photoluminescence spectra
• Raman spectra
• transitional
• chalcogen
• alkali
• disordered
• nonmetal