单词	cerous
释义	cerous /ˈsirəs / adjective Of cerium in its lower valency (3).The fluorescence of the cerous ion in aqueous solution has been the subject of a number of studies 1-3.... The amount of cerous chloride is 5% or less, more preferably 2% or less on the basis of the weight of chromic oxide. 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.
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