Powder X-Ray diffraction analysis was carried out an all samples. Samples prepared without DHP exhibit no crystalline peaks, while with DHP crystalline peaks emerge. The only feature present in non-DHP samples is the broad scattering attributed to amorphous silica often found centered near 23 °2θ. This feature is also present, superimposed upon the crystalline peaks in our DHP samples, suggesting that the materials do contain silica as well. In the case of samples prepared with DHP in the gel, the peak intensity appears to increase when DHP and (NH4)2Fe(SO4)2 are introduced at greater quantities, but the same molar ratio. All four samples contain the (10\(\overset{\overline{}}{2}\)) and (100) of the DHP samples also contain many of the higher order peaks for content increases, the position of the peaks move closer to that of pristine \(\alpha\)-quartz. In addition to the \(\alpha\)-quartz phase, peaks at 21.05 and 22.75 °2θ appear weakly for 0.50 g DHP and strongly for 1.00 g DHP samples. We believe these belong to a tridymite like phase of FePO4 (t-FePO4).8 the presence of iron phosphate domains prompted us to investigate the P content of the materials prepared with DHP by ICP. Analysis yielded the following molar quatities of P (\(\mu\)mol): Fe-SBA-15 (75) 1.1, Fe-SBA-15 (22) 8.1, Fe-SBA-15 (12) 12.1, Fe-SBA-15 (7) 10.8. These quantites equate to nFe:nP of approimately 1:1, which is in agreement with the stoichiometry of \(\alpha\)-FePO4 and t-FePO4.