Acceleration and inhibition effects of phosphate on phase transformation of amorphous calcium carbonate into vaterite

Yuki Sugiura, Kazuo Onuma, Yuki Kimura, Katsuo Tsukamoto, Atsushi Yamazaki

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Phase transformation of amorphous calcium carbonate (ACC) into vaterite and its subsequent stability was investigated at a constant pH (∼8.2), ionic strength, and temperature that simulated the biological environment. Solutions containing the same concentrations of CaCl2, Na2CO 3, and tris(hydroxymethyl)aminomethane buffer and various concentrations of PO4 (0-62.5 μM) were prepared, and precipitates in the solutions were sampled at a constant interval to observe the morphology and type of calcium carbonate polymorphs that appeared. The change in the Ca-ion concentration over time, which served as a guide for phase transformation of ACC into crystalline phases, was measured in relation to the PO4 concentration. The starting time of phase transformation was at the minimum point when the concentration was ∼2-3 μM. Vaterite spherulites consisting of needle-like crystals (0.5-2 μm in length) formed only in this PO 4 range and survived the experimental procedure (∼2.5 h). In contrast, the starting time of phase transformation increased exponentially with the PO4 concentration when it was higher than 5 μM. The vaterite spherulites and calcite crystals co-precipitated, and both polymorphs grew over time. The PO4 was shown to be an accelerator for phase transformation from ACC into vaterite at low concentrations (Ca/PO4 molar ratio <3000) and an inhibitor for transformation at high concentrations. We investigated the kinetics of vaterite formation in the presence of PO 4 and derived an advanced concept for cluster-based phase transformation. This investigation showed that the appearance and stability of calcium carbonate polymorphs is easily controlled by adjusting the PO 4 concentration.

    Original languageEnglish
    Pages (from-to)262-270
    Number of pages9
    JournalAmerican Mineralogist
    Volume98
    Issue number1
    DOIs
    Publication statusPublished - 2013 Jan

    Fingerprint

    vaterite
    Calcium Carbonate
    calcium carbonates
    calcium carbonate
    phase transformations
    phosphates
    Phase transitions
    Phosphates
    phosphate
    spherulite
    spherulites
    Polymorphism
    crystal
    ion concentration
    effect
    calcite
    needles
    inhibitors
    crystals
    low concentrations

    Keywords

    • Amorphous calcium carbonate
    • Biomineralization
    • Phase transformation
    • Phosphate
    • Vaterite

    ASJC Scopus subject areas

    • Geochemistry and Petrology
    • Geophysics

    Cite this

    Acceleration and inhibition effects of phosphate on phase transformation of amorphous calcium carbonate into vaterite. / Sugiura, Yuki; Onuma, Kazuo; Kimura, Yuki; Tsukamoto, Katsuo; Yamazaki, Atsushi.

    In: American Mineralogist, Vol. 98, No. 1, 01.2013, p. 262-270.

    Research output: Contribution to journalArticle

    Sugiura, Yuki ; Onuma, Kazuo ; Kimura, Yuki ; Tsukamoto, Katsuo ; Yamazaki, Atsushi. / Acceleration and inhibition effects of phosphate on phase transformation of amorphous calcium carbonate into vaterite. In: American Mineralogist. 2013 ; Vol. 98, No. 1. pp. 262-270.
    @article{82c063260b294c569db5f0e5a4875b68,
    title = "Acceleration and inhibition effects of phosphate on phase transformation of amorphous calcium carbonate into vaterite",
    abstract = "Phase transformation of amorphous calcium carbonate (ACC) into vaterite and its subsequent stability was investigated at a constant pH (∼8.2), ionic strength, and temperature that simulated the biological environment. Solutions containing the same concentrations of CaCl2, Na2CO 3, and tris(hydroxymethyl)aminomethane buffer and various concentrations of PO4 (0-62.5 μM) were prepared, and precipitates in the solutions were sampled at a constant interval to observe the morphology and type of calcium carbonate polymorphs that appeared. The change in the Ca-ion concentration over time, which served as a guide for phase transformation of ACC into crystalline phases, was measured in relation to the PO4 concentration. The starting time of phase transformation was at the minimum point when the concentration was ∼2-3 μM. Vaterite spherulites consisting of needle-like crystals (0.5-2 μm in length) formed only in this PO 4 range and survived the experimental procedure (∼2.5 h). In contrast, the starting time of phase transformation increased exponentially with the PO4 concentration when it was higher than 5 μM. The vaterite spherulites and calcite crystals co-precipitated, and both polymorphs grew over time. The PO4 was shown to be an accelerator for phase transformation from ACC into vaterite at low concentrations (Ca/PO4 molar ratio <3000) and an inhibitor for transformation at high concentrations. We investigated the kinetics of vaterite formation in the presence of PO 4 and derived an advanced concept for cluster-based phase transformation. This investigation showed that the appearance and stability of calcium carbonate polymorphs is easily controlled by adjusting the PO 4 concentration.",
    keywords = "Amorphous calcium carbonate, Biomineralization, Phase transformation, Phosphate, Vaterite",
    author = "Yuki Sugiura and Kazuo Onuma and Yuki Kimura and Katsuo Tsukamoto and Atsushi Yamazaki",
    year = "2013",
    month = "1",
    doi = "10.2138/am.2013.4212",
    language = "English",
    volume = "98",
    pages = "262--270",
    journal = "American Mineralogist",
    issn = "0003-004X",
    publisher = "Mineralogical Society of America",
    number = "1",

    }

    TY - JOUR

    T1 - Acceleration and inhibition effects of phosphate on phase transformation of amorphous calcium carbonate into vaterite

    AU - Sugiura, Yuki

    AU - Onuma, Kazuo

    AU - Kimura, Yuki

    AU - Tsukamoto, Katsuo

    AU - Yamazaki, Atsushi

    PY - 2013/1

    Y1 - 2013/1

    N2 - Phase transformation of amorphous calcium carbonate (ACC) into vaterite and its subsequent stability was investigated at a constant pH (∼8.2), ionic strength, and temperature that simulated the biological environment. Solutions containing the same concentrations of CaCl2, Na2CO 3, and tris(hydroxymethyl)aminomethane buffer and various concentrations of PO4 (0-62.5 μM) were prepared, and precipitates in the solutions were sampled at a constant interval to observe the morphology and type of calcium carbonate polymorphs that appeared. The change in the Ca-ion concentration over time, which served as a guide for phase transformation of ACC into crystalline phases, was measured in relation to the PO4 concentration. The starting time of phase transformation was at the minimum point when the concentration was ∼2-3 μM. Vaterite spherulites consisting of needle-like crystals (0.5-2 μm in length) formed only in this PO 4 range and survived the experimental procedure (∼2.5 h). In contrast, the starting time of phase transformation increased exponentially with the PO4 concentration when it was higher than 5 μM. The vaterite spherulites and calcite crystals co-precipitated, and both polymorphs grew over time. The PO4 was shown to be an accelerator for phase transformation from ACC into vaterite at low concentrations (Ca/PO4 molar ratio <3000) and an inhibitor for transformation at high concentrations. We investigated the kinetics of vaterite formation in the presence of PO 4 and derived an advanced concept for cluster-based phase transformation. This investigation showed that the appearance and stability of calcium carbonate polymorphs is easily controlled by adjusting the PO 4 concentration.

    AB - Phase transformation of amorphous calcium carbonate (ACC) into vaterite and its subsequent stability was investigated at a constant pH (∼8.2), ionic strength, and temperature that simulated the biological environment. Solutions containing the same concentrations of CaCl2, Na2CO 3, and tris(hydroxymethyl)aminomethane buffer and various concentrations of PO4 (0-62.5 μM) were prepared, and precipitates in the solutions were sampled at a constant interval to observe the morphology and type of calcium carbonate polymorphs that appeared. The change in the Ca-ion concentration over time, which served as a guide for phase transformation of ACC into crystalline phases, was measured in relation to the PO4 concentration. The starting time of phase transformation was at the minimum point when the concentration was ∼2-3 μM. Vaterite spherulites consisting of needle-like crystals (0.5-2 μm in length) formed only in this PO 4 range and survived the experimental procedure (∼2.5 h). In contrast, the starting time of phase transformation increased exponentially with the PO4 concentration when it was higher than 5 μM. The vaterite spherulites and calcite crystals co-precipitated, and both polymorphs grew over time. The PO4 was shown to be an accelerator for phase transformation from ACC into vaterite at low concentrations (Ca/PO4 molar ratio <3000) and an inhibitor for transformation at high concentrations. We investigated the kinetics of vaterite formation in the presence of PO 4 and derived an advanced concept for cluster-based phase transformation. This investigation showed that the appearance and stability of calcium carbonate polymorphs is easily controlled by adjusting the PO 4 concentration.

    KW - Amorphous calcium carbonate

    KW - Biomineralization

    KW - Phase transformation

    KW - Phosphate

    KW - Vaterite

    UR - http://www.scopus.com/inward/record.url?scp=84872050774&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84872050774&partnerID=8YFLogxK

    U2 - 10.2138/am.2013.4212

    DO - 10.2138/am.2013.4212

    M3 - Article

    VL - 98

    SP - 262

    EP - 270

    JO - American Mineralogist

    JF - American Mineralogist

    SN - 0003-004X

    IS - 1

    ER -