Alkali, Nonmetal, Real part of permittivity

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