Preparation and properties of primary leonhardite, (Na, K)-exchanged forms of laumontite

Atsushi Yamazaki, Takahiro Shiraki, Hironori Ishida, Ryohei Otsuka

    Research output: Contribution to journalArticle

    Abstract

    (Na, K)-exchanged forms of laumontite, co-called "primary leonhardite", can be prepared under hydrothermal conditions. The products show two steps of dehydration at about 180 and 240°C on TG-DTA curves, the same as previous reports about primary leonhardite. XRD data recorded under controlled relative-humidity suggest that the synthetic "primary leonhardite" maintains a similar framework structure to the fully hydrated phase of laumontite between 0 and 100% RH at 25°C. The number of water molecules varied from 13 to 17 per unit cell when replacing Ca by alkaline cations. The alkaline extra-framework cation sites of "primary leonhardite" are determined by Rietveld's method.

    Original languageEnglish
    Pages (from-to)32-33
    Number of pages2
    JournalStudies in Surface Science and Catalysis
    Volume98
    Issue numberC
    DOIs
    Publication statusPublished - 1995

    Fingerprint

    Cations
    Positive ions
    Rietveld method
    cations
    preparation
    Dehydration
    dehydration
    Differential thermal analysis
    humidity
    Atmospheric humidity
    thermal analysis
    Molecules
    Water
    curves
    products
    cells
    water
    molecules

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Catalysis
    • Physical and Theoretical Chemistry
    • Materials Chemistry
    • Surfaces, Coatings and Films

    Cite this

    Preparation and properties of primary leonhardite, (Na, K)-exchanged forms of laumontite. / Yamazaki, Atsushi; Shiraki, Takahiro; Ishida, Hironori; Otsuka, Ryohei.

    In: Studies in Surface Science and Catalysis, Vol. 98, No. C, 1995, p. 32-33.

    Research output: Contribution to journalArticle

    Yamazaki, Atsushi ; Shiraki, Takahiro ; Ishida, Hironori ; Otsuka, Ryohei. / Preparation and properties of primary leonhardite, (Na, K)-exchanged forms of laumontite. In: Studies in Surface Science and Catalysis. 1995 ; Vol. 98, No. C. pp. 32-33.
    @article{bf7108cff4424151a3765362f99f4fa5,
    title = "Preparation and properties of primary leonhardite, (Na, K)-exchanged forms of laumontite",
    abstract = "(Na, K)-exchanged forms of laumontite, co-called {"}primary leonhardite{"}, can be prepared under hydrothermal conditions. The products show two steps of dehydration at about 180 and 240°C on TG-DTA curves, the same as previous reports about primary leonhardite. XRD data recorded under controlled relative-humidity suggest that the synthetic {"}primary leonhardite{"} maintains a similar framework structure to the fully hydrated phase of laumontite between 0 and 100{\%} RH at 25°C. The number of water molecules varied from 13 to 17 per unit cell when replacing Ca by alkaline cations. The alkaline extra-framework cation sites of {"}primary leonhardite{"} are determined by Rietveld's method.",
    author = "Atsushi Yamazaki and Takahiro Shiraki and Hironori Ishida and Ryohei Otsuka",
    year = "1995",
    doi = "10.1016/S0167-2991(06)81072-4",
    language = "English",
    volume = "98",
    pages = "32--33",
    journal = "Studies in Surface Science and Catalysis",
    issn = "0167-2991",
    publisher = "Elsevier BV",
    number = "C",

    }

    TY - JOUR

    T1 - Preparation and properties of primary leonhardite, (Na, K)-exchanged forms of laumontite

    AU - Yamazaki, Atsushi

    AU - Shiraki, Takahiro

    AU - Ishida, Hironori

    AU - Otsuka, Ryohei

    PY - 1995

    Y1 - 1995

    N2 - (Na, K)-exchanged forms of laumontite, co-called "primary leonhardite", can be prepared under hydrothermal conditions. The products show two steps of dehydration at about 180 and 240°C on TG-DTA curves, the same as previous reports about primary leonhardite. XRD data recorded under controlled relative-humidity suggest that the synthetic "primary leonhardite" maintains a similar framework structure to the fully hydrated phase of laumontite between 0 and 100% RH at 25°C. The number of water molecules varied from 13 to 17 per unit cell when replacing Ca by alkaline cations. The alkaline extra-framework cation sites of "primary leonhardite" are determined by Rietveld's method.

    AB - (Na, K)-exchanged forms of laumontite, co-called "primary leonhardite", can be prepared under hydrothermal conditions. The products show two steps of dehydration at about 180 and 240°C on TG-DTA curves, the same as previous reports about primary leonhardite. XRD data recorded under controlled relative-humidity suggest that the synthetic "primary leonhardite" maintains a similar framework structure to the fully hydrated phase of laumontite between 0 and 100% RH at 25°C. The number of water molecules varied from 13 to 17 per unit cell when replacing Ca by alkaline cations. The alkaline extra-framework cation sites of "primary leonhardite" are determined by Rietveld's method.

    UR - http://www.scopus.com/inward/record.url?scp=77956912440&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=77956912440&partnerID=8YFLogxK

    U2 - 10.1016/S0167-2991(06)81072-4

    DO - 10.1016/S0167-2991(06)81072-4

    M3 - Article

    VL - 98

    SP - 32

    EP - 33

    JO - Studies in Surface Science and Catalysis

    JF - Studies in Surface Science and Catalysis

    SN - 0167-2991

    IS - C

    ER -