Mg-Nb-O-Pb, Nb-x polyhedra, Temperature for structural transition

• Mg-Nb-O-Pb-Ti
• Cd-Mg-Nb-O-Pb
• Mg-Nb-O-Pb-Ta-Zn
• Bi-Mg-Nb-O-Pb
• transitional
• chalcogen
• disordered
• alkaline
• nonmetal
• cubic
• tetragonal
• monoclinic
• orthorhombic
• trigonal