Experiments on the simultaneous partitioning of divalent metal ions between hedenbergite or tremolite and 2M aqueous chloride solutions under supercritical conditions

Etsuo Uchida, Junichi Uekusa, Tasuku Kataoka

    Research output: Contribution to journalArticle

    Abstract

    Experiments on the simultaneous exchange of Ni2+, Mg2+, Co2+, Zn2+, Fe2+, Mn2+, Ca2+ and Sr2+ between hedenbergite or tremolite and 2M aqueous chloride solutions were carried out in the temperature range of 500 to 800°C, 1 kb. The PC-IR curves for the both minerals show a similar shape and have peaks near Ni2+ and Ca2+. The former peak corresponds to 6 coordination and the latter peak to 8 coordination. The PC-IR curves suggest that Ni2+, Mg2+ and Fe2+ are partitioned preferably in 6 coordination of the minerals and Mn2+, Ca2+ and Sr2+ in 8 coordination. However Co2+ and Zn2+ deviate from such a trend. The ion selectivity decreases with increasing temperature.

    Original languageEnglish
    Pages (from-to)233-241
    Number of pages9
    JournalJapanese Magazine of Mineralogical and Petrological Sciences
    Volume34
    Issue number5
    DOIs
    Publication statusPublished - 2005

    Fingerprint

    hedenbergite
    tremolite
    Minerals
    Metal ions
    Chlorides
    partitioning
    chloride
    ion
    metal
    Ion exchange
    experiment
    Experiments
    Ions
    Temperature
    mineral
    temperature
    co-ordination

    Keywords

    • Aqueous chloride solution
    • Hedenbergite
    • Partition coefficient
    • PC-IR diagram
    • Supercritical condition
    • Tremolite

    ASJC Scopus subject areas

    • Geochemistry and Petrology
    • Economic Geology

    Cite this

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    title = "Experiments on the simultaneous partitioning of divalent metal ions between hedenbergite or tremolite and 2M aqueous chloride solutions under supercritical conditions",
    abstract = "Experiments on the simultaneous exchange of Ni2+, Mg2+, Co2+, Zn2+, Fe2+, Mn2+, Ca2+ and Sr2+ between hedenbergite or tremolite and 2M aqueous chloride solutions were carried out in the temperature range of 500 to 800°C, 1 kb. The PC-IR curves for the both minerals show a similar shape and have peaks near Ni2+ and Ca2+. The former peak corresponds to 6 coordination and the latter peak to 8 coordination. The PC-IR curves suggest that Ni2+, Mg2+ and Fe2+ are partitioned preferably in 6 coordination of the minerals and Mn2+, Ca2+ and Sr2+ in 8 coordination. However Co2+ and Zn2+ deviate from such a trend. The ion selectivity decreases with increasing temperature.",
    keywords = "Aqueous chloride solution, Hedenbergite, Partition coefficient, PC-IR diagram, Supercritical condition, Tremolite",
    author = "Etsuo Uchida and Junichi Uekusa and Tasuku Kataoka",
    year = "2005",
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    language = "English",
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    pages = "233--241",
    journal = "Japanese Magazine of Mineralogical and Petrological Sciences",
    issn = "1349-7979",
    publisher = "Nihon Koubutsu Gakkai",
    number = "5",

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    TY - JOUR

    T1 - Experiments on the simultaneous partitioning of divalent metal ions between hedenbergite or tremolite and 2M aqueous chloride solutions under supercritical conditions

    AU - Uchida, Etsuo

    AU - Uekusa, Junichi

    AU - Kataoka, Tasuku

    PY - 2005

    Y1 - 2005

    N2 - Experiments on the simultaneous exchange of Ni2+, Mg2+, Co2+, Zn2+, Fe2+, Mn2+, Ca2+ and Sr2+ between hedenbergite or tremolite and 2M aqueous chloride solutions were carried out in the temperature range of 500 to 800°C, 1 kb. The PC-IR curves for the both minerals show a similar shape and have peaks near Ni2+ and Ca2+. The former peak corresponds to 6 coordination and the latter peak to 8 coordination. The PC-IR curves suggest that Ni2+, Mg2+ and Fe2+ are partitioned preferably in 6 coordination of the minerals and Mn2+, Ca2+ and Sr2+ in 8 coordination. However Co2+ and Zn2+ deviate from such a trend. The ion selectivity decreases with increasing temperature.

    AB - Experiments on the simultaneous exchange of Ni2+, Mg2+, Co2+, Zn2+, Fe2+, Mn2+, Ca2+ and Sr2+ between hedenbergite or tremolite and 2M aqueous chloride solutions were carried out in the temperature range of 500 to 800°C, 1 kb. The PC-IR curves for the both minerals show a similar shape and have peaks near Ni2+ and Ca2+. The former peak corresponds to 6 coordination and the latter peak to 8 coordination. The PC-IR curves suggest that Ni2+, Mg2+ and Fe2+ are partitioned preferably in 6 coordination of the minerals and Mn2+, Ca2+ and Sr2+ in 8 coordination. However Co2+ and Zn2+ deviate from such a trend. The ion selectivity decreases with increasing temperature.

    KW - Aqueous chloride solution

    KW - Hedenbergite

    KW - Partition coefficient

    KW - PC-IR diagram

    KW - Supercritical condition

    KW - Tremolite

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