Spontaneous polarization

• Nb-O-Pb-Ti-Zn
• C-Cl-H-N-O-S
• Bi-Fe-O
• O-Pb-Ti
• Ba-O-Ti
• chalcogen
• ferroelectric
• nonmetal
• transitional
• oxide
• orthorhombic
• tetragonal
• trigonal
• monoclinic
• cubic