Another important variation in MOF structures is the modification of linkers and the underlying network topology. To better understand how these modifications influence the heat capacity, we look at a set of zeolitic imidazolate framework (ZIF) structures with different organic linkers. These materials are ideal for this investigation as they can be synthesized with the same topology but varying linkers, as well as the same chemistry of linkers but varying topology. However, the number of atoms and the dimensions of the unit cell of these ZIF structures are too large for DFT calculations, and therefore we used the UFF force field.