M. Elgadi et al., A NEW GRAPHITE-INTERCALATION COMPOUND CONTAINING SODIUM ASSOCIATED WITH OXYGEN, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 244, 1994, pp. 29-34
A new second stage blue phase of donor-type with an interplanar distan
ce of 745 pm has been synthesized by reaction of graphite with partly
oxidized sodium. It contains oxygen in form of peroxide ions.