Precipitation of thorium or uranium(VI) complex ion with cobalt(III) or chromium(III) complex cation. II. Precipitation of thorium and uranium(VI) sulfito complex ions.:Precipitation of Thorium and Uranium(VI) Sulfito Complex Ions

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概要

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• The precipitations of thorium and uranium(VI) sulfito complex ions with hexammine cobalt(X) chloride as the precipitant have been studied.<BR>The orange-colored uranium(VI) precipitate obtained is [Co(NH<SUB>3</SUB>)<SUB>6</SUB>]<SUB>4</SUB>[UO<SUB>2</SUB>(SO<SUB>3</SUB>)<SUB>3</SUB>]<SUB>3</SUB>22H<SUB>2</SUB>O, which is in the form of square bipyramid, about 4 μm across in a cubic symmetry of the diamond type with <I>a</I> =10.40 Å It decomposes to an oxide mixture of Co<SUB>3</SUB>0<SUB>4</SUB> and U<SUB>3</SUB>O<SUB>8</SUB> above 850°C in the air through a sulfate mixture of CoSO<SUB>4</SUB> and UO<SUB>2</SUB>SO<SUB>4</SUB>.<BR>Composition of the thorium precipitate varies with the precipitation conditions. Therefore, it is considered that the thorium precipitate contains thorium hydroxide and basic thorium sulfite.

• 一般社団法人 日本原子力学会の論文

著者

• UENO Kaoru

  Japan Atomic Energy Research Institute

• HOSHI Michio

  Japan Atomic Energy Research Institute

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• Precipitation of thorium or uranium(VI) complex ion with cobalt(III) or chromium(III) complex cation. II. Precipitation of thorium and uranium(VI) sulfito complex ions.:Precipitation of Thorium and Uranium(VI) Sulfito Complex Ions

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