Journal of Thermal Analysis and Calorimetry

, Volume 96, Issue 1, pp 73–76

Crystallization and thermal characterization of calcium hydrogen phosphate dihydrate crystals


DOI: 10.1007/s10973-008-9841-1

Cite this article as:
Madhurambal, G., Subha, R. & Mojumdar, S.C. J Therm Anal Calorim (2009) 96: 73. doi:10.1007/s10973-008-9841-1


Calcium hydrogen phosphate dihydrate (CHPD) is found quite frequently in urinary calculi (stones). The CHPD crystals were grown by the single diffusion gel growth technique in sodium metasilicate gel. The crystals were found to be having platelet and broad needle type morphologies. The crystals were analyzed by FTIR spectroscopy. The thermal properties were studied by employing the thermogravimetric analysis (TG). Various kinetic and thermodynamic parameters for dehydration were estimated from the TG curve. The selected platelet was studied by scanning electron microscope (SEM) for the growth morphologies indicating that the crystals grew in the form of leaflets having prominent (010) faces. This was in agreement with earlier reported studies.


calcium hydrogen phosphate dihydrate crystalsFTIRkinetic parametersmorphologySEMTGthermodynamic parameters

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  1. 1.A D M College for WomenTamil NaduIndia
  2. 2.Bharathiyar College of Engineering and TechnologyKaraikalIndia
  3. 3.Department of Chemical Engineering and Applied ChemistryUniversity of TorontoTorontoCanada
  4. 4.Department of Engineering University of New BrunswickSaint JohnCanada