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
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- KAKUDA Yasushi
- Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
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- UCHIDA Etsuo
- Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
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- IMAI Naoya
- Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
Bibliographic Information
- Other Title
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- 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
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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
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- Mining Geology
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Mining Geology 41 (230), 339-349, 1991
The Society of Resource Geology
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Details 詳細情報について
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- CRID
- 1390001206526526848
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- NII Article ID
- 130003639892
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- NII Book ID
- AN00082385
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- NDL BIB ID
- 3754007
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- ISSN
- 00265209
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed