with K = 0.9 nm as a constant, λ = 1.542 Å as wavelength of Cu-Kα, and β in radian. By a manual evaluation of the XRD chart, the particle size of nanosilica was found to be about 7 nm. Also, Figure 6 depicts the TEM micrograph of the nanosilica. The shape of the silica grains is spherical with an average particle size of 6 nm, which is in agreement with the size estimated by Scherer's formula.