SODIUM-GRAPHITE INTERCALATION COMPOUND OF THE FIRST STAGE - 2-DIMENSIONAL STRUCTURE AND STABILITY

The two-dimensional structure was investigated for the sodium-graphite intercalation compound obtained from the ambient pressure decompositi on of superdense sodium C2Na. The sodium sublattice possesses hexagona l symmetry (a = 3.60 Angstrom). This sublattice is rotated by 30 degre es relative to the graphite layer. The mechanism of formation and the chemical nature of this compound are described in a moder that conside rs metal-metal interactions within an intercalate bilayer. The structu ral data for various graphite intercalation compounds are compared wit h those for the sodium bilayer intercalate package, first-stage struct ure.