In this manuscript, CaSiO3 nanoceramics were synthesized by a modified sol–gel method. The influence of fuel addition on the phase composition, crystal structure, and other structural properties was inspected. To emphasize the properties of the nanoceramic, some characterization devices were used in this study. The highly intense diffraction peaks of XRD patterns reveal that the appropriate content of fuel could produce a single crystalline phase of CaSiO3 nanoceramics having the desired composition. The crystallite size and lattice strain values were assessed by different methods such as Debye–Sherrer’s equation, Sherrer’s plot, W–H plot, and size–strain plot. The graphical representation of the unit cell structure of α-CaSiO3was accessed by the VESTA tool of visualization. The crystal structure and lattice parameters were executed by Rietveld refinement by implementing C1 space group symmetry of α-CaSiO3 in the triclinic phase. All the quality aspects in simulation such as reliability factor and GOF are found to be in reasonable range. SEM micrographs accomplished the morphological study. The morphology of the particles changed from irregular to evenly distributed spheroidal particles by fuel addition. Thus, the impact of fuel concentration during synthesis is an important factor that affects the physical properties such as densification and crystallinity of the ceramics.