Effect of carbonate contents on crystal structure of a-type carbonate apatites

Toshiyuki Ikoma, Yosinori Kubo, Atsushi Yamazaki, Masaru Akao, Junzo Tanaka

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    A-type carbonate apatites with different CO3 contents were obtained by heating hydroxyapatite powder in dry carbon dioxide atmosphere at 1173 K for 1 to 64 hours. The replacement of CO3 ions lowered the crystal symmetry to hexagonal (P63/m) → hexagonal (P-6) → monoclinic (Pb) in that order. The a-axis parameters were linearly increased with the increase of CO3 ions, while the b- and c-axis parameters were varied little. The lattice parameters of the A-type carbonate apatite completely replaced by CO3 ions were refined to be a = 0.9572(1), b = 0.6877(1). The splitting of IR absorption bands attributed to a PO4 ion also supported the lowering of crystal symmetries.

    Original languageEnglish
    Pages (from-to)191-194
    Number of pages4
    JournalKey Engineering Materials
    Volume192-195
    Publication statusPublished - 2001

    Fingerprint

    Carbonates
    Apatite
    Crystal structure
    Ions
    Crystal symmetry
    Durapatite
    Hydroxyapatite
    Carbon Dioxide
    Powders
    Lattice constants
    Absorption spectra
    Carbon dioxide
    Heating
    carboapatite

    ASJC Scopus subject areas

    • Chemical Engineering (miscellaneous)
    • Ceramics and Composites

    Cite this

    Effect of carbonate contents on crystal structure of a-type carbonate apatites. / Ikoma, Toshiyuki; Kubo, Yosinori; Yamazaki, Atsushi; Akao, Masaru; Tanaka, Junzo.

    In: Key Engineering Materials, Vol. 192-195, 2001, p. 191-194.

    Research output: Contribution to journalArticle

    Ikoma, Toshiyuki ; Kubo, Yosinori ; Yamazaki, Atsushi ; Akao, Masaru ; Tanaka, Junzo. / Effect of carbonate contents on crystal structure of a-type carbonate apatites. In: Key Engineering Materials. 2001 ; Vol. 192-195. pp. 191-194.
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