| http://www.w3.org/ns/prov#value | - For example, alumina, magnesium oxide and zinc oxide and other metal oxides, boron nitride and aluminum nitride and other metal nitrides, silicon carbide and other carbides, diamond of natural or synthetic origin, and any of the various physical forms of each type and other metal carbides and hybrid stoichiometric and non-stoichiometric mixed oxides, nitrides and carbides.
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