Alkali, Chalcogen, Disordered, Real part of permittivity

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