| http://www.w3.org/ns/prov#value | - The actual surfacearea, as measured by nitrogen adsorption, is typically in the range of 30 to 60 m.sup.2 /g.Referring now to the Figures, FIG. 1 is an electron micrograph which shows a group of electroconductive particles, in the form of shells, which have been prepared according to the invention.
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