Due in part to strong quantum finite-size effects, accurate determination of the relative cluster energies is best accomplished using ab-initio calculations, and the number of low-energy configurational isomers is estimated to grow exponentially with the number of atoms in the cluster . For these reasons searching for the ground state atomic structure can be computationally demanding. An alternative approach to identifying low-energy structures is to search through a reference database of known Low-energy structures mined from existing literature Many of the clusters in the QCD have been studied before, including systematic DFT studies of small and large clusters across different elements. We collected the atomic structures of clusters from publications that provide atomic coordinates of reported low-energy structures, as calculated using DFT, and from the Cambridge Cluster Database, which consists primarily of structures discovered using empirical potentials. All structures from the literature were relaxed using our DFT settings as described in the section on DFT calculations. In Table , we provide the literature references for these cluster structures grouped by element.