Mg-Nb-O-Pb, Mg-x polyhedra, Real part of permittivity

• Mg-Nb-O-Pb-Ti
• Bi-Mg-Nb-O-Pb
• La-Mg-Nb-O-Pb
• Mg-Nb-O-Pb-Ti-W
• nonmetal
• disordered
• chalcogen
• alkaline
• transitional
• cubic
• tetragonal
• monoclinic
• trigonal
• orthorhombic