Nb-x polyhedra, Oxide, Structural transitions

• Mg-Nb-O-Pb-Ti
• Na-Nb-O
• K-Na-Nb-O
• Ag-Nb-O
• Fe-Nb-O-Pb
• temperature for structural transition
• pressure for structural transition
• pressure derivative of transition temperature
• transitional
• chalcogen
• oxide
• nonmetal
• disordered
• orthorhombic
• cubic
• tetragonal
• trigonal
• monoclinic