Y. Sargin, M. Kızılyallı, C. Telli
1997
Citations
1
Influential Citations
50
Citations
Journal
Journal of The European Ceramic Society
Abstract
Abstract Tetracalcium phosphate, Ca4P2O9, (TetCP) a major compound of a cement in dentistry was prepared through different solid-state reactions at 1300 and 1350 °C. Modified methods were used for the reported reactions and a new method of synthesis was suggested which was given by the following equation: 4 CaCO3 + 2NH4H2PO4 → Ca4P2O9 + 4 CO2 + 2NH3 + 3H2O The refined monoclinic parameters of TetCP were found to be a = 7.017 (4), b = 12.021 (8), c = 9.483 (6) A and β = 88.21 ° (8), which are in good agreement with the reported data. The space group is P2 l m . The IR spectra of TetCP was analysed with respect to space group P2 l m and the band assignments were done for the first time in this work.