## 3 Results and Discussion  
The samples were obtained by hydrothermal synthesis after four days at 175 \({}^{\circ}\)C. The aluminum was added after the third day of synthesis, and the samples were then returned to the oven for the fourth day of heating. Afterwards, the samples were calcined at 550 \({}^{\circ}\)C. The complete synthesis is described in the Materials and Methods section, and the Si/Al ratios of the products are summarized in Table 1. The total Si/Al ratio of the products was initially measured by the XRF technique, and the results were similar to the Si/Al ratio of the synthesis gel. X-ray diffraction (XRD) experiments of the calcined samples were performed to prove that HPM-1 was obtained (Figures 2 and 3). To improve the visibility, the diffractograms were slightly shifted in their intensity. The Pure_Silica sample demonstrates the reproducibility of the original synthesis [4] and is used as the reference for comparison to the other obtained samples. It is possible to compare the peak positions of the samples as an indication of the incorporation of a heteroatom in the framework [17]. The substitution of an atom by a different atom in the unit cell results in a distortion of the cell parameters, owing to its different characteristics (e.g., volume, charge). Since the Bragg reflections of an X-ray diffractogram correspond to the different planes and atomic positions, a slight change in these positions, or atomic substitutions, will be reflected in the displacement of the 2\(\theta\) values of the peaks. In this case, we are studying the incorporation of \begin{table}
\begin{tabular}{c c c} \hline \hline
**Sample** & **Si/Al Synthesis Gel (Calculated)** & **Si/Al Products (XRF)** \\ \hline SiAl15 & 15 & 19.4 \\ SiAl25 & 25 & 25.4 \\ SiAl35 & 35 & 38.0 \\ Pure\_Silica & \(\infty\) & \(\infty\) \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Obtained products. Figure 2: X-ray diffractograms of the calcined products. aluminum, so a shift to lower 20 values, relative to those of the pure silica samples, indicates that aluminum was effectively incorporated into the framework. Figure 3 shows the 20 region between 8\({}^{\circ}\) and 13\({}^{\circ}\), confirming that this displacement did occur in the three samples when Al was added, possibly suggesting that the aluminum entered the zeolitic framework. As expected, the SiAl15 sample with the highest quantity of Al added showed the largest shift in the diffractogram. Nevertheless, this observation still needs to be confirmed by other techniques because it is difficult to quantify the Si/Al\({}_{\text{TETRA}}\) ratio with the X-ray diffractograms alone. The difference in the intensities of the same peak positions, among the samples, was another interesting observation from the X-ray diffractograms. These intensity values were normalized to create the average relative crystallinity index, with the number one assigned to the highest intensity of the four peaks at the same 20 range. To obtain the average, the peak intensities were measured in the following 20 ranges, 10.3-10.5\({}^{\circ}\), 12.3-13.5\({}^{\circ}\), 16.6-16.3\({}^{\circ}\), and 24.1-24.8\({}^{\circ}\). The results are shown in Table 2. Comparing the aluminosilicate samples, a lower quantity of aluminum in the synthesis helped to obtain a higher average crystallinity index. Surprisingly, the Pure_Silica sample showed the opposite behavior, probably because the presence of aluminum influenced its nucleation and the growth procedure was accelerating it. These results do not mean that the samples are amorphous; this is just a comparison among them as previously reported in the literature [18]. Studying the magic-angle spinning (MAS) NMR spectra of the calcined solids can provide more precise information on the Si and Al states, since this technique can calculate the Si/Al ratio, assuming that it is larger than seven (proven later). Therefore, the samples synthesized with aluminum were analyzed with this technique, as described by [PERSON] [12].