The presence of the hydrotalcites phase was confirmed by PXRD, as all doped HTs exhibited characteristic reflections of LDHs, Figure . The lower angle [00l] reflections ((003) at 2θ ≈ 11.4 °, (006) at 22.9° and (009) at 34.6° for all examined samples indicate formation of a layered structure with 3R symmetry and can be used to calculate the interlayer spacing parameter, c, which varies from 23.1 to 23.6 nm for the doped samples aged at different temperatures, Table . The value of c depends on multiple factors, including the strength of Coulombic attraction between the positively charged cation layers and the negatively charged interlayer anions , as well the relative quantity of interlayer anions and water .