| http://www.w3.org/ns/prov#value | - Also of interest are the oxides of such metals, particularly magnetic oxides such as iron, nickel, cobalt or alloys thereof, as well as metal oxides, e.g., alumina or silica, or oxides of other elements, such as titanium dioxide and barium oxide, and other inorganic materials such as sulfates such as barium sulfate; dielectric materials such as perovskites, barium titanates. etc., and electrical c
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