We will investigate a series of aluminophosphate systems, in particular related to small pore materials and determine the short and medium range order structures and more importantly the nature of pore-size in one-dimensional channel and 3-dimensional pore systems in the as-synthesised and activated materials . For this purpose we will use NIMROD which has the unique feature of measuring SANS and diffraction data which when processed will provide the necessary information on the nature of the short and medium range order and the pore structure of the nanoporous materials. We will prepare these materials through hydrothermal methods and activate them through calcination process. We will investigate the material when exposed to D2O molecules and in dry state to understand the differences in the local and medium range structures and their effect on pores.