| http://www.w3.org/ns/prov#value | - A third method of manufacturing a clathrate compound according to the present invention is a method wherein a compound of a group 4B element from the periodic table which incorporates at least one element to become the doping atoms and the substitution atoms is crushed, in an inert atmosphere, to a powder with a granular diameter of no more than 100 ??m, and is then spread into a thin film inside
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