In the structure the Ga 3+ -ions are bridged by hydroxy groups, forming a 1D chain similar to the one found in the prototypical MOF MIL-53. Each mellitic acid is coordinating to four individual Ga(OH) 2 chains with the carboxylate groups in 1, 2, The powder x-ray diffraction (PXRD) patterns of the crystals in Figure show the reproduced synthesis, simulated pattern and pattern of the modulated synthesis of MIL-116(Ga). The modulated pattern shows all high intensity reflections also found in the simulated pattern from the single crystal structure and the reproduced synthesis; however, we find intensity changes for the (002), (202), ( ) and (022) reflections, which is attributed to the spherical particle shape after modulation.