| http://www.w3.org/ns/prov#value | - The target material can also be a pure metal such as gold, copper, platinum, silver, lead, tin, selenium, aluminum, tungsten, molybdenum, iridium, and rhodium; alloys such as steel, bronze, and solders; and nanocrystalline materials including nanocrystalline metals and nanocrystalline ceramics.
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