| http://www.w3.org/ns/prov#value | - The method includes preparing an aqueous mixture of cation precursor and decolorizing agent such as charcoal or activated carbon, filtering the mixture, combining the filtrate with anion precursor to form an impure molten salt, removing water from the impure molten salt, and passing the impure molten salt through alumina or silica to form substantially pure molten salt.
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