In conclusion, the complex morphology changes result in superstructures with retention of their initial crystallinity without the need for external modulators or additives. An excess of one of the molecular building blocks results in the saturation of the crystal surface and trapping of the other compound in solution. Both processes are expected to decrease the rate of the crystal growth. In anisotropic structure like ours, this can lead to preferable binding of the excess molecular component to the growing facets, thereby altering the crystal habit. Therefore, instead of using an "external" modulator with a chemical structure different than that of the molecular building blocks, the building blocks can be used as an "internal" modulator simply by changing their molecular ratios. Tailormade additives are well known for shaping crystals. Alivisatos, Kniep, Yang, and others reported the use of splitting agents. Sheaf-like antimony sulfide crystals were obtained by using different quantities of a copolymer to control the level of splitting. In contrast to the splitting mechanism often observed for other materials, this study shows that hyperbranched MOFs can form by non-crystallographic branching.