The cobalt cyclotetraphosphate was synthesized by two step reaction . The first reaction between matal carbonate and phosphoric acid forming metal di-hydrogen phosphate precursor .2nd the precursor fired and sintered at elevated different temperatures to optimize best conditions to obtain Co2P4O12 crystal form with high purity .The products were monitored by both of XRD ,IR spectra by additional to accurate imaging via scanning electron microscope (SEM) to analyze surface nature specially this compound is applied as pigment colorant and cyclic phosphates family have many applications as protective layer biodegradable bones or composites .Micro-structural features of the metal cyclotetraphosphate were investigated carefully and the grain size was estimated and found to be in between 4.38-3.76 μm .Structural investigations via XRD proved that the product obtained at 1100°C is the best and fine structure with monoclinic structure phase and C12/C1 space group . A visualized investigations were performed to confirm structure validity and stability at elevated temperatures . Visualization of crystal lattice of cobalt cyclotetraphosphate indicated by many of structural parameters inside the lattice that responsible for high stability at elevated temperatures .
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