Mg-Nb-O-Pb, Nb-x polyhedra, Thermal expansion

• Mg-Nb-O-Pb-Ti
• Mg-Nb-O-Pb-Zr
• Fe-Mg-Nb-O-Pb-W
• Ba-Mg-Nb-O-Pb
• linear thermal expansion coefficient
• transitional
• disordered
• alkaline
• chalcogen
• nonmetal
• cubic
• tetragonal
• monoclinic
• trigonal
• orthorhombic