Enhancement of HPO4-OH layered structure in octacalcium phosphate and its morphological evolution by acetic acid

Yuki Sugiura, Kazuo Onuma, Atsushi Yamazaki

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    10 Citations (Scopus)


    We show that acetic acid enhances the HPO4-OH layer structure of octacalcium phosphate (OCP) and hypothesize that the presence of acetic acid is essential for obtaining large-sized highly crystalline OCP with relatively high-temperature (∼65°C) aqueous-solution synthesis methods. The OCP crystal consists of three types of layer structures (apatite-like, transition, and HPO4-OH). X-ray diffraction (XRD) analysis indicates that increasing acetic acid concentration leads to the development of their greater structure. Infrared (IR) and nuclear magnetic resonance (NMR) spectroscopic measurements indicated development of the highly HPO4-OH layer-structure. The enhanced layer structure development caused by acetic acid is in contrast to the generally observed decrease in HPO4-OH layer structure in the presence of -COOH-containing molecules such as citrate and succinate.

    Original languageEnglish
    Pages (from-to)1178-1184
    Number of pages7
    JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
    Issue number11
    Publication statusPublished - 2016 Nov 1



    • Acetic acid
    • Carboxyl (-COOH)
    • Large crystal
    • Layer structure
    • Octacalcium phosphate (OCP)

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Chemistry(all)
    • Condensed Matter Physics
    • Materials Chemistry

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