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Constraints on the Short-Range Structure of Amorphous Calcium Phosphate: A Precursor in the Formation of Hydroxylapatite

Hoeher, Alexandria J
http://orcid.org/0000-0002-1754-4181
http://rave.ohiolink.edu/etdc/view?acc_num=miami1438256566

Abstract Details

2015, Master of Science, Miami University, Geology and Environmental Earth Science.
The process of crystallization of hydroxylapatite is not yet fully understood and in some cases may include the development of at least one precursor phase. Amorphous calcium phosphate (ACP) is a known precursor phase and it has been proposed that spherical clusters of calcium and phosphate partial components of or are precursors to ACP. ACP was synthesized and analyzed with x-ray diffraction, raman spectroscopy, transmission electron microscopy, pair distribution function analysis, and extended x-ray absorption fine structure spectroscopy to elucidate the existence of clusters and to determine their chemistry and structure. Pair distribution function analysis confirmed a short range structure of about 10 Å, the proposed size of the clusters. The clusters have similarities to hydroxylapatite and brushite, but have an independent structure. Further study is needed to detail the atomic positions and symmetry of these clusters.
John Rakovan, Dr. (Advisor)
Olaf Borkiewicz, Dr. (Committee Member)
Mark Krekeler, Dr. (Committee Member)
Geology; Mineralogy; Nanoscience
hydroxylapatite; nanoparticles; Posners clusters; brushite; amorphous calcium phosphate; EXAFS; PDF; crystal growth

Recommended Citations

Citations

  • Hoeher, A. J. (2015). Constraints on the Short-Range Structure of Amorphous Calcium Phosphate: A Precursor in the Formation of Hydroxylapatite [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1438256566

    APA Style (7th edition)

  • Hoeher, Alexandria. Constraints on the Short-Range Structure of Amorphous Calcium Phosphate: A Precursor in the Formation of Hydroxylapatite. 2015. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1438256566.

    MLA Style (8th edition)

  • Hoeher, Alexandria. "Constraints on the Short-Range Structure of Amorphous Calcium Phosphate: A Precursor in the Formation of Hydroxylapatite." Master's thesis, Miami University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1438256566

    Chicago Manual of Style (17th edition)

miami1438256566
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© 2015, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.