Crystallisation of a highly metastable hydrated calcium pyrophosphate phase
CrystEngComm Pub Date: 2012-12-10 DOI: 10.1039/C2CE26499D
Abstract
A simple and fast synthesis method was set up to obtain pure hydrated calcium pyrophosphate (CPP) phases of biological interest. This work focused on a specific phase synthesised at 25 °C and pH 4.5 in a stirred tank reactor. Powder X-ray diffraction, FTIR spectroscopy, scanning electron microscopy and thermogravimetric analyses revealed that the phase is unknown but presents similarities with a monoclinic tetrahydrated CPP phase (Ca2P2O7·4H2O, m-CPPT β phase) synthesised under the same conditions of pH and temperature. Characterisation of the unreferenced phase (u-CPP) has been performed, especially to better identify its composition, structure and stability, as well as its possible relation to the m-CPPT β phase or to other hydrated CPP phases.
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Journal Name：CrystEngComm
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