In short, the preferential crystal growth along the (100) and (101) planes, as a function of higher polymer concentrations, transformed the crystal anisotropy by promoting crystal elongation from its original HB shape. For a hexagonal lattice system, the impact of polymer presence in the reacting environment accelerated the growth along the c axis. Moreover, with a higher quantity of added polymers, the subtle width broadening of the strongest peak corresponding to the (102) crystal face implies a slight decrease in particle size. In addition, the relative Bragg peaks of ( ) and (201) also become broader and less intense compared to the original MIL-96, supporting the minor reduction in particle size and crystallinity.