Chalcogen, Oxide, Kim, Optical properties, Trigonal

• Fe-Lu-O
• Bi-Fe-O
• Bi-Na-O-Ti
• Ba-Bi-Na-O-Ti-Zr
• Er-Fe-O
• phonons
• optical spectra
• Raman spectra
• X-ray absorption spectra
• magnetic dichroism
• chalcogen
• oxide
• transitional
• disordered
• non-disordered