Alkali, Nonmetal, Transitional, Imaginary part of permittivity

• Bi-Na-O-Ti-W
• K-Nb-O-Ta
• Br-Co-Rb
• Ba-Bi-Na-O-Ti
• Dy-Fe-Na-Nb-O-Pb
• transitional
• nonmetal
• alkali
• chalcogen
• oxide
• cubic
• trigonal
• tetragonal
• orthorhombic
• monoclinic