For the present work, calcite nanocrystals were grown by annealing precursors at 500 °C. These obtained three different thermal schemes. Among these schemes, two involve heating 100 °C for 16 h and + 24 h, respectively. In third scheme, was performed followed 300 h. X-ray diffraction studies, Fourier transform infrared Raman spectroscopic exhibited formation of phase calcium carbonate. Transmis...