| http://www.w3.org/ns/prov#value | - Examples of such usable magnetic material include iron oxides such as magnetite, hematite or ferrite; metals such as iron, cobalt or nickel; and alloys of such metals with other metals such as aluminum, cobalt, copper, lead, magnesium, tin, zinc, antimony, beryllium, bismuth, cadmium, calcium, manganese, selenium, titanium, tungsten or vanadium; and mixtures thereof.
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