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  • 1 Université Cadi Ayyad Laboratoire de Chimie Physique, Faculté des Sciences B. P. S 15 40001 Marrakesh Marocco
  • | 2 Ecole Nationale Supérieure de Chimie Centre de Gènie Photochimique 118, Route de Narbonne 31077 Toulouse-Cedex France
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Mixed calcium-cobalt orthophosphates, of the general formula Ca3-xCOx(PO4)2 with 0≤x≤1.1, were prepared by coprecipitation. Reactions which occur during heating from room temperature to 850°C, of either tricalcium phosphate or mixed Ca−Co phosphates, were monitored by thermogravimetry and differential thermal analysis. The dried precipitates and the final products were characterised by X-ray diffraction and infrared spectroscopy.