Alkaline, Chalcogen, Oxide, Optical properties, Orthorhombic

• Ba-Cu-O-Y
• Ca-La-Mn-O
• O-Ru-Sr
• Bi-Ca-Cu-O-Sr
• Cu-La-O-Sr
• phonons
• luminescence
• optical spectra
• wavenumber of optical phonon
• Raman spectra
• oxide
• chalcogen
• alkaline
• transitional
• disordered