Chalcogen, Dielectric loss tangent, Nb-x polyhedra

• Fe-Nb-O-Pb
• K-Na-Nb-O
• Mg-Nb-O-Pb-Ti
• Bi-Nb-O-Sr
• Cd-Mg-Nb-O-Pb
• chalcogen
• transitional
• oxide
• disordered
• nonmetal
• cubic
• tetragonal
• orthorhombic
• trigonal
• monoclinic