超臨界条件下におけるコルンブ石と2M塩化物水溶液間の多元素同時分配実験

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  • Experiments on the simultaneous partitioning of divalent cations between columbite and 2M aqueous chloride solution under supercritical conditions
  • チョウリンカイ ジョウケン カ ニ オケル コルンブセキ ト 2M エンカブツ スイヨウエキ カン ノ タゲンソ ドウジ ブンパイ ジッケン

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The experiments on simultaneous partitioning of divalent cations (Mg2+, Ca(Mg2+, Mn(Mg2+, Fe(Mg2+, Co(Mg2+, Ni(Mg2+, and Zn(Mg2+) between columbite (ferrocolumbite FeNb2O6 and manganocolumbite MnNb2O6) and 2M aqueous chloride solution were conducted under supercritical hydrothermal conditions of 500 to 800°C, 1 kb.<br> Partition coefficient vs ionic radius diagram (PC-IR diagram) revealed that PC-IR curves drawn based on the partition coefficients of Co(Mg2+, Fe(Mg2+, Mn(Mg2+ and Ca(Mg2+ have a peak around ionic radius of Fe(Mg2+ (0.78 Å) for ferrocolumbite and a peak between ionic radius of Fe(Mg2+ and Mn(Mg2+ (0.81 Å) for manganocolumbite. Ni(Mg2+ shows a positive deviation and Zn(Mg2+ shows a negative deviation from the obtained PC-IR curves. On the other hand, Mg(Mg2+ shows a normal behavior at 500°C, but a positive deviation at higher temperatures than 600°C.

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  • 資源地質

    資源地質 65 (3), 107-115, 2015

    資源地質学会

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