Several steps of preprocessing are applied to the raw datasets. First, we filter our values outside 15 K of the room temperature, noble gases and radio-isotopes (A > 93). If input duplicates are found, we store their median. Finally, we discard all the data points outside 3 standard deviations from the overall mean. Fig. compares the distributions of the mentioned local repositories with the corresponding dataset from which we gather the additional data. Except for sporadic cases, we observe a general agreement in shape between the considered pairs of datasets. As expected, local repositories generally cover a smaller range of values with respect to the data gathered from the archives. Further details about sizes and value range for all datasets are given in Tab. 1. With the only exception of the band gap datasets pair, the size of the archives' data are always larger.