Alkali, Nonmetal, Dielectric loss tangent, Tetragonal

• K-Na-Nb-O
• Bi-Na-O-Ti
• K-Li-Na-Nb-O-Sb
• Ba-Bi-Na-O-Ti
• Bi-K-Na-O-Ti
• nonmetal
• chalcogen
• alkali
• transitional
• oxide