Abstract
A previously unknown compound of sodium and graphite, having an ideal formula C 64Na is described. It has a lamellar structure in which sodium is intercalated in every eighth interplanar gap and appears to be analogous to the K-, Rb-, and Cs- graphite lamellar compounds. The main evidence for its existence and structure is from X-ray diffraction studies, supported by magnetic susceptibility determinations and measurements of the dilation occurring when graphite is immersed in sodium.
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