| http://www.w3.org/ns/prov#value | - The thus freed of soluble salts such as sodium and magnesium sulphate precipitate was pre-dried in the usual manner, and calcined in an indirectly heated rotary kiln at 400 ??? C. [0060] [0060] In Tabelle 2 sind die Eigenschaften des erhaltenen Endproduktes aufgef???hrt.
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