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Metallic cerium is prepared by metallothermic reduction techniques, such as by reducing cerous fluoride with calcium, or by electrolysis of molten cerous chloride or other cerous halides.
Cobalt is incorporated into the electrolyte in addition to the cerous ion.
The fluorescence of the cerous ion in aqueous solution has been the subject of a number of studies 1-3.
Generally cerous salts are yellow to reddish while ceric slats are white.
The amount of cerous chloride is 5% or less, more preferably 2% or less on the basis of the weight of chromic oxide.
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