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

• KAKUDA Yasushi

  Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University

• UCHIDA Etsuo

  Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University

• IMAI Naoya

  Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University

Bibliographic Information

Other Title

• 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
• イオン コウカンホウ ニ ヨル CaSiO3 MnSiO3 Ca Mn Cl2

Abstract

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.

Journal

• Mining Geology

  Mining Geology 41 (230), 339-349, 1991

  The Society of Resource Geology

Keywords

• Phase equilibria
• CaSiO<SUB>3</SUB>-MnSiO<SUB>3</SUB> system
• Aqueous chloride solution
• Wollastonite
• Bustamite
• Rhodonite
• Pyroxmangite
• Xonotlite
• Johannsenite

Details

• CRID: 1390001206526526848
• NII Article ID: 130003639892
• NII Book ID: AN00082385
• DOI: 10.11456/shigenchishitsu1951.41.339
• NDL BIB ID: 3754007
• ISSN: 00265209
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3754007
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed