| http://www.w3.org/ns/prov#value | - Alternatively the clay can be mixed with water and a soluble sodium compound such as sodium bicarbonate, sodium carbonate, sodium hydroxide and the like, optionally with an alkaline earth metal compound selected from the group consisting of magnesium oxide, magnesium carbonate, magnesium hydroxide, calcium oxide, calcium hydroxide, and mixtures thereof, and shearing the mixture such as with a pugm
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