Crystal Structure of Sr-Substituted Hydroxyapatite Synthesized by Hydrothermal Method

Masanori Kikuchi, Atsushi Yamazaki, Ryohei Otsuka, Masaru Akao, Hideki Aoki

    Research output: Contribution to journalArticle

    36 Citations (Scopus)

    Abstract

    Single crystals of Sr-substituted hydroxyapatite, (Ca9.42Sr0.18 H0.8(PO4)6(OH)2, up to 0.2 × 0.2 × 5 mm3 maximum size were grown hydrothermally from calcium hydrogenphosphate (CaHPO4) and strontium hydrogenphosphate (SrHPO4) in a long tube-type autoclave using a temperature gradient technique. The single crystals, containing 1.92 mole% Sr to (Ca + Sr) and having a (Ca + Sr)/P atomic ratio of 1.60, had a hexagonal-prismatic shape with density of 3.207 g/cm3. The crystal had a hexagonal system, space group P63/m with a = 9.3920(7) Å, c = 6.890(1) Å, and Z = 1. A hexagonal-prismatic crystal, 165 × 165 × 231 μ3 in size, was used for crystal structure refinement. The atomic parameters in P63/m were refined to R = 5.9% and RwÅ = 6.3% with 2018 independent reflections. The preferential substitution site of Sr for Ca was determined as the Ca(1) site.

    Original languageEnglish
    Pages (from-to)373-378
    Number of pages6
    JournalJournal of Solid State Chemistry
    Volume113
    Issue number2
    DOIs
    Publication statusPublished - 1994 Dec

    Fingerprint

    Durapatite
    Hydroxyapatite
    Crystal structure
    Single crystals
    Crystals
    Strontium
    crystal structure
    autoclaves
    single crystals
    Autoclaves
    strontium
    Thermal gradients
    crystals
    calcium
    Calcium
    temperature gradients
    Substitution reactions
    substitutes
    tubes

    ASJC Scopus subject areas

    • Materials Chemistry
    • Physical and Theoretical Chemistry
    • Inorganic Chemistry

    Cite this

    Crystal Structure of Sr-Substituted Hydroxyapatite Synthesized by Hydrothermal Method. / Kikuchi, Masanori; Yamazaki, Atsushi; Otsuka, Ryohei; Akao, Masaru; Aoki, Hideki.

    In: Journal of Solid State Chemistry, Vol. 113, No. 2, 12.1994, p. 373-378.

    Research output: Contribution to journalArticle

    Kikuchi, Masanori ; Yamazaki, Atsushi ; Otsuka, Ryohei ; Akao, Masaru ; Aoki, Hideki. / Crystal Structure of Sr-Substituted Hydroxyapatite Synthesized by Hydrothermal Method. In: Journal of Solid State Chemistry. 1994 ; Vol. 113, No. 2. pp. 373-378.
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    AU - Aoki, Hideki

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