Chalcogen, Oxide, Quaternary, Electric polarization, Kim

• Co-Mn-O-W
• Bi-Cr-Fe-O
• Ge-O-Pb-Sr
• Fe-Ge-Na-O
• K-Li-Nb-O
• values of electric polarization
• spontaneous polarization
• quaternary
• oxide
• chalcogen
• transitional
• nonmetal
• trigonal
• orthorhombic
• tetragonal
• monoclinic
• hexagonal