Alkali, Ferroelectric, Nonmetal, Transitional, Real part of permittivity

• Bi-Na-O-Ti
• Ba-F-K-O-Ti
• K-Na-Nb-O
• Ba-Bi-Na-O-Ti
• Fe-K-Li-Nb-O-Ta
• transitional
• ferroelectric
• alkali
• nonmetal
• chalcogen
• tetragonal
• orthorhombic
• trigonal
• cubic
• monoclinic