Spontaneous polarization - temperature diagram

• Nb-O-Pb-Ti-Zn
• Co-Mn-O-W
• H-K-O-P
• Cl-Rb-Zn
• Ba-O-Ti
• nonmetal
• ferroelectric
• chalcogen
• transitional
• quaternary
• orthorhombic
• monoclinic
• tetragonal
• cubic
• trigonal