Abstract
Municipal inorganic waste material (eggshell), which was chosen as the source of calcium carbonate, was utilized to synthesize two industrially valuable inorganic compounds, calcium oxide and calcium hydroxide following a sustainable synthesis method. The crystallographic parameters such as lattice parameter, unit cell volume, crystallite size, microstrain, dislocation density, relative intensity, crystal growth preference, and crystallinity index of raw eggshell, calcium oxide, and calcium hydroxide were explored based on the X-ray diffraction. The polymorphic mole fraction of calcite, vaterite, and aragonite in natural eggshells was also estimated. Crystallite size was calculated with the assistance of the Scherrer equation along with Williamson–Hall Method, Monshi-Scherrer Method, and Liner straight-line method of Scherrer’s equation. A relationship among the crystal growth preference, dislocation density, and microstrain was established for the considering compounds. The raw eggshells and synthesized products were also characterized with the aid of Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Fourier Transform Infrared (FTIR), and Scanning Electron Microscopy (SEM).
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