| http://www.w3.org/ns/prov#value | - Examples of such fillers are ground quartz, diatomaceous silicas, calcium carbonate, calcined clay, rutile-type titanium dioxide, iron, zinc, chromium, zirconium and magnesium oxides, various forms of alumina (hydrated or otherwise), boron nitride, lithopone and barium metaborate; their specific surface area is generally below 30 m2 /g.
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