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Related Experiment Videos

Monoclinic hydroxyapatite.

J C Elliott, P E Mackie, R A Young

    Science (New York, N.Y.)
    |June 8, 1973
    PubMed
    Summary
    This summary is machine-generated.

    The monoclinic phase of hydroxyapatite (Ca2(PO4)4OH) has been confirmed via single-crystal analysis. This finding clarifies the crystal structure of this important biomaterial.

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    Area of Science:

    • Crystallography
    • Materials Science
    • Biomineralization

    Background:

    • Hydroxyapatite is a key component of bone and teeth.
    • Understanding its crystal structure is crucial for biomaterial applications.
    • Previous studies suggested potential polymorphs of hydroxyapatite.

    Purpose of the Study:

    • To confirm the existence of a monoclinic phase of hydroxyapatite.
    • To determine the precise crystal structure of this monoclinic phase.
    • To compare its structure to related apatites like chlorapatite.

    Main Methods:

    • Single-crystal structure analysis was employed.
    • A hydroxyapatite specimen was prepared by converting chlorapatite crystals.
    • X-ray diffraction data was collected and refined.

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    Main Results:

    • The existence of a monoclinic hydroxyapatite phase was confirmed.
    • The crystal structure was determined with space group P21/b and specific lattice parameters.
    • The structure showed distortions analogous to chlorapatite.

    Conclusions:

    • The monoclinic phase of hydroxyapatite is structurally validated.
    • This provides a more accurate model for hydroxyapatite's crystalline forms.
    • The findings have implications for understanding apatite formation and behavior.