Solid alumina Al2O3 has many industrial applications. Recently it was found that porous anodic alumina film formed by anodizing aluminium in an appropriate acidic/alkaline solution is a typical self-ordered nanoporous material extensively used for developing functional nanodevices. The atomic structure of porous anodic alumina remains unclear. Using high-energy x-ray diffraction we have found that the structure factors of liquid and porous alumina are quite similar except for significant small-angle scattering in the latter case. Small x-ray weighting for O-O correlations is the main problem to generate reliable structural model for amorphous alumina from atomic to nanoscale. Consequently, we are asking one (1) day on NIMROD to measure 5 samples of mesoporous amorphous alumina.