F. Goutfer-wurmser et al., Comparison of the intercalation into graphite of phosphorus-potassium and mercury-potassium binaries, MOLEC CRYST, 340, 2000, pp. 229-234
Potassium-phosphorus binaries are able to intercalate into graphite as pota
ssium-oxygen or potassium-sulphur binaries, so that phosphorus behave as a
classical electronegative element. But, it is able, on the other hand, to b
ehave as a metal such as mercury. so that potassium-phosphorus and potassiu
m-mercury binaries intercalate into graphite by very close synthesis routes
. Phosphorus appears thus as a linking element between strongly and fairly
electronegative species.