Abstract
Di-calcium phosphate dihydrate triclinic CaHPO4 center dot 2H(2)O was heated at 750 degrees C and 450 degrees C to obtain the tetragonal beta-Ca2P2O7 and grey-coloured tetragonal gamma-Ca2P2O7 phase. The pellets of beta-Ca2P2O7 gamma-Ca2P2O7 were prepared and dried at 120 degrees C for 4 hours. The pellets having mean thickness of 2 mm were characterized by XRD, optical microscopy, FTIR, TGA, SEM, UV-visible spectroscopy and dc-electrical measurements. Before sintering micro-cracks were seen however these cracks were disappeared after sintering at 750 degrees C. XRD confirmed the single crystalline phase. UV-vis. Spectra showed absorption in UV-region. DC-electrical resistivity exhibited that beta-Ca2P2O7 is more conducting as compared to gamma-Ca2P2O7 phase.