Alkali, Chalcogen, Oxide, Real part of permittivity, Tetragonal

• Bi-Na-O-Ti
• Ba-F-K-O-Ti
• Ba-Na-Nb-O-Ti
• Ba-Bi-Na-O-Ti
• Ba-La-Na-O-Ti
• transitional
• oxide
• alkali
• chalcogen
• nonmetal