Determination of Precise Unit-Cell Parameters of the α-Tricalcium Phosphate Ca3(PO4)2 Through High-Resolution Synchrotron Powder Diffraction |
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| Authors: | Masatomo Yashima Yoichi Kawaike Masahiko Tanaka |
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| Affiliation: | Department of Materials Science and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohma, 226-8502, Japan; WEBRAM/SPring-8, National Institute for Materials Science, Hyogo, 679-5198, Japan |
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| Abstract: | Unit-cell parameters of the α-tricalcium phosphate [TCP; Ca3(PO4)2] were investigated using high-resolution synchrotron powder diffraction and the Rietveld method. The diffraction experiment was conducted at 29°C at the BL-15XU experimental station of SPring-8, Japan. Precise unit-cell parameters of the α-TCP were obtained; a =12.87271 (9), b =27.28034(8), c =15.21275(12) Å, α=γ=90°, and β=126.2078(4)°. The calculated density of α-TCP (2.8677 g/cm3) is smaller than that of β-TCP, indicating the "looser" structure of α-TCP. |
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