B-x polyhedra, Electronic and electrical properties, Fe-O, Trigonal

• Fe-O-Ti
• B-Fe-Gd-O
• B-Fe-O-Tb
• B-Fe-Nd-O
• Bi-Fe-K-O-Ti
• electrical conductivity
• effective mass
• electronic energy gap
• values of electronic energy gap
• permittivity (dielectric constant)
• transitional
• chalcogen
• metalloid
• non-disordered
• nonmetal