The scattering curve at 0 s in Fig. depicts the initial structure of the aqueous 0.1 M DAP solution. The scattering patterns changed after mixing at 10 s, when a 0.05 M struvite "solution" was formed, and continued to evolve until 300 s. Accordingly, at 10 s and thereafter, we observe a steep increase for q < 0.5 nm -1 , following an approximate I(q) ∝ q -4 relationship and corresponds to the formation of large scattering Porod interfaces .