“…4 along with an estimate of the similarity factor (defined as the RDF dot product between two structures) provide further evidence that the H2-1 and H2-2 configurations are indeed distinct despite having similar enthalpies. In this case, using a Gaussian spread of 0.008 56 , we find a similarity factor of 0.5358 and 0.6102 between the H2-1 and H2-2 structures for the SnSe 2 and SnS 2 systems, respectively. Noticeably, the main difference in the RDFs comes from the second-nearest neighbor, explaining the similar covalent network and, therefore, the very similar vibrational and low-energy electron properties of the H2 derivatives.…”