Chalcogen, Conductor, Semiconductor, Raman spectra

• Bi-Fe-O
• Ba-O-Ti
• O-Zn
• Ba-Cu-O-Y
• O-Ti
• chalcogen
• conductor
• semiconductor
• transitional
• non-disordered
• cubic
• orthorhombic
• tetragonal
• trigonal
• monoclinic