イオン交換法によるCaSiO<SUB>3</SUB>-MnSiO<SUB>3</SUB>-(Ca,Mn)CL<SUB>2</SUB>-H<SUB>2</SUB>O系の相平衡実験

DOI Web Site 被引用文献5件
  • 角田 康嗣
    Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
  • 内田 悦生
    Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
  • 今井 直哉
    Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University

書誌事項

タイトル別名
  • Experimental Study on Phase Equilibria in the System CaSiO<SUB>3</SUB>-MnSiO<SUB>3</SUB>-(Ca, Mn)CL<SUB>2</SUB>-H<SUB>2</SUB>O by Means of Ion Exchange
  • イオン コウカンホウ ニ ヨル CaSiO3 MnSiO3 Ca Mn Cl2

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説明

Stability relations of minerals in the system CaSiO3-MnSiO3-H2O have been determined experimentally by means of ion exchange in the temperature range from 400 to 800°C under lkbar. Aqueous chloride solution was used as a transport and exchange medium for cations Ca 2+ and Mn 2+. Stable minerals under the experimental conditions are wollastonite, bustamite, rhodonite, pyroxmangite, xonotlite and johannsenite.<BR>Rhodonite is a high temperature polymorph of pyroxmangite and the transition temperature depends on the chemical composition. Pure pyroxmangite inverts to rhodonite at 725°C. Three phases, rhodonite, pyroxmangite and bustamite can coexist with each other at 525°C. Bustamite shows a wide stability field concerning temperature and composition. Johannsenite becomes stable below 450°C. The transition temperature between wollastonite and xonotlite was obtained to be 475°C for the end member composition.<BR>The experimental results revealed that manganese ion is preferentially partitioned into the minerals, whereas calcium ion into the aqueous chloride solution. This tendency is enhanced with decreasing temperature.

収録刊行物

  • 鉱山地質

    鉱山地質 41 (230), 339-349, 1991

    資源地質学会

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