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|Section2= }} Radium chloride (RaCl2) is a chemical compound of radium and chlorine, and the first radium compound isolated in a pure state. Marie Curie and André-Louis Debierne used it in their original separation of radium from barium.〔Curie, M.; Debierne, A. (1910). ''C. R. Hebd. Acad. Sci. Paris'' 151:523–25.〕 The first preparation of radium metal was by the electrolysis of a solution of this salt using a mercury cathode.〔Kirby, p. 3〕 ==Preparation== Radium chloride crystallises from solution as the dihydrate. It may be dehydrated by heating to 100 °C in air for one hour followed by hours at 520 °C under argon. If the presence of other anions is suspected, the dehydration may be effectuated by fusion under hydrogen chloride. Radium chloride can also be prepared by heating radium bromide in a flow of dry hydrogen chloride gas, or by dehydrating radium sulfate with dry air and then heating the sulfate in a stream of hydrogen chloride.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Radium chloride」の詳細全文を読む スポンサード リンク
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