Fig. 3: Visualization of the training data set.
From: Machine learning-enabled chemical space exploration of all-inorganic perovskites for photovoltaics

a Decomposition enthalpy with mixing entropy term \((\Delta {H}_{{\rm{decomp}}}-T\Delta {S}_{{\rm{mix}}})\) versus Bartel’s tolerance factor (τ) and b histogram of bandgap with the number of data for indirect and non-indirect bandgap displayed. “Non-indirect” includes direct, metallic, and semi-metallic materials. c Pearson correlation coefficient between the four output properties and fractions of elements.