Electronic and electrical properties, Nb-x polyhedra, Orthorhombic

• K-Na-Nb-O
• Na-Nb-O
• Bi-Nb-O-Sr
• H-N-O-S
• Ag-Nb-O
• electrical conductivity
• effective mass
• permittivity (dielectric constant)
• electronic energy gap
• values of electronic energy gap
• transitional
• chalcogen
• oxide
• disordered
• non-disordered