Chalcogen, Elastic compliance, Nb-x polyhedra

• Mg-Nb-O-Pb
• Ga-La-Nb-O
• Mg-Nb-O-Pb-Ti
• H-N-O-S
• K-Nb-O-Ta
• disordered
• chalcogen
• nonmetal
• piezoelectric
• transitional
• cubic
• trigonal
• tetragonal
• orthorhombic
• monoclinic