Electronic and electrical properties, Fe-Nb-O-Pb, Nb-x polyhedra

• Fe-Nb-O-Pb-Ti
• Fe-Nb-O-Pb-Ti-Zr
• Fe-Mn-Nb-O-Pb
• Fe-Mg-Nb-O-Pb-W
• permittivity (dielectric constant)
• dielectric loss tangent
• ferroelectric transitions
• conductivity or resistivity
• disordered
• transitional
• chalcogen
• oxide
• ferroelectric
• cubic
• monoclinic
• tetragonal
• trigonal
• orthorhombic