Chalcogen, Imaginary part of permittivity, Nb-x polyhedra

• Li-Nb-O
• Mg-Nb-O-Pb-Ti
• Fe-Nb-O-Pb
• Bi-Nb-O-Sr
• K-Nb-O-Ta
• chalcogen
• transitional
• oxide
• disordered
• ferroelectric
• cubic
• tetragonal
• trigonal
• monoclinic
• orthorhombic