| http://www.w3.org/ns/prov#value | - Cristobalite, calcium silicate, zirconium silicate, montmorillonites, such as bentonites, zeolites, including molecular sieves, such as sodium aluminum silicate, metal oxide powders, such as aluminum oxides or zinc oxides or their mixed oxides, barium sulfate, calcium carbonate, gypsum and plastic powders may also be suitable as fillers.
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