Determination of Precise Unit-Cell Parameters of the α-Tricalcium Phosphate Ca3(PO4)2 Through High-Resolution Synchrotron Powder Diffraction
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==90°, and =126.2078(4)°. The calculated density of α-TCP (2.8677 g/cm3) is smaller than that of -TCP, indicating the “looser” structure of α-TCP.
Document Type: Research Article
Affiliations: 1: Department of Materials Science and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohma, 226-8502, Japan 2: WEBRAM/SPring-8, National Institute for Materials Science, Hyogo, 679-5198, Japan
Publication date: January 1, 2007