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Article: Synthesis and Characterization of Arsenate/Phosphate Fluorapatite Solid Solutions
- Article from:
- Metallurgical and Materials Transactions
- Article date:
- November 1, 2009
- Author:
CopyrightCopyright Minerals, Metals & Materials Society Nov 2009. Provided by ProQuest LLC. (Hide copyright information)
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A series of arsenate-substituted fluorapatite (FA) was directly prepared through the aqueous precipitation method. Characterization studies from elemental analysis. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, and scanning electron microscopy (SEM) have confirmed the formation of the arsenate/phosphate fluorapatite solid solutions (AsPFAs), i.e., Ca^sub 5^(P^sub x^As^sub 1-x^O^sub 4^)^sub 3^F, which had a single phase of apatite structure. The analysis of the measurements indicated that the unit cell a and c parameters did not vary smoothly with the degree of substitution, as expected by Vegard's law. The morphology was dependent of the arsenate/phosphate ratio. The ...