Details

Autor(en) / Beteiligte

• Campet, G.
• Portier, J.
• Subramanian, M.A.

Titel

Electronegativity versus Fermi energy in oxides: the role of formal oxidation state

Ist Teil von

• Materials letters, 2004, Vol.58 (3), p.437-438

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2004

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A new method derived from the Nethercot postulate is used to evaluate the Fermi energy ( E f) of simple iono-covalent oxides. One demonstrates that E f is only determined from the electronegativity of the cations ( χ) and of its formal oxidation state ( z) leading to the formula: E f =(−0.12z+1.26)χ+1.13z−0.17 A mathematical consequence of this expression is that when the electronegativity of cations increases, the Fermi energies of the corresponding oxides tend towards an isoelectronegativity point whatever may be the oxidation number. In practice, it is applicable to the most covalent oxides such as P 2O 5, SeO 3, XeO 3, Re 2O 7, OsO 4 and others.