Dielectric loss tangent, Pb-x polyhedra

• O-Pb-Zr
• O-Pb-Ti-Zr
• Fe-Nb-O-Pb
• La-O-Pb-Ti-Zr
• Mg-Nb-O-Pb-Ti
• chalcogen
• transitional
• disordered
• oxide
• nonmetal
• cubic
• tetragonal
• orthorhombic
• trigonal
• monoclinic