Mg-Nb-O-Pb, Nb-x polyhedra, Nonmetal, Transitional

• Mg-Nb-O-Pb-Ti
• Cd-Mg-Nb-O-Pb
• Bi-Mg-Nb-O-Pb
• Mg-Nb-O-Pb-Ta-Zn
• electronic and electrical properties
• structural properties
• permittivity (dielectric constant)
• phase transitions
• structural transitions
• nonmetal
• disordered
• alkaline
• chalcogen
• transitional
• cubic
• tetragonal
• monoclinic
• trigonal
• orthorhombic