| http://www.w3.org/ns/prov#value | - A fourth method of manufacturing a clathrate compound according to the present invention is a method wherein a fine powder of an intercalant graphite intercalation compound with a granular diameter of no more than 100 ??m and incorporating at least one element to become the doping atoms and the substitution atoms is spread into a thin film inside a heat resistant vessel and then left to stand, and
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