As part of the data gathered through the use of the CrystalNN bond-detection algorithm, we store in our dataset the coordination environment of all the materials. Meaning, for each material, we obtain a list of bonds present and the coordination number of each atom. This information is stored in JSON format, like this: In this case, we see that for material mp-39105, there are two types of bonds: Mg-N and Ta-N, and all atoms (Mg, Ta, and N) are systematically 6-coordinated. We also see that other information, about the crystal system and space group, the chemical formula, and the topology are stored: here, the material has only one net, which has a three-dimensional ste topology.