ABSTRACT
The fluorine concentration of a Q.F compound drastically affects its electronic properties. Varying the [F] concentration may lead to electrical resistivities which are qualitatively different relative to that of the host material and to that for dilute CXF compounds. We therefore first present a brief overview of the existing models for conduction which may apply to fluorine-GICs. It is well known by solid-state physicists that in practice there exist three types of elec tronic conduction in inorganic crystalline solids: metallic and semimetallic con ductivities and semiconductivity. In most GICs, large concentrations of atoms or molecules are added to increase the electrical conductivity through charge transfer. Thus the host material, which is semimetallic, may become metallic after intercalation.
