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We combined the group theory and data mining approach within the OrganicMaterials Database that leads to the prediction of stable Dirac-point nodeswithin the electronic band structure of 3-dimensional organic crystals. We finda particular space group $P2_12_12_1$ ($\#19$) that is conducive to the Diracnodes formation. We prove that nodes are a consequence of the orthorhombiccrystal structure. Within the electronic band structure, two different kinds ofnodes can be distinguished: 8-fold degenerate Dirac nodes protected by thecrystalline symmetry and 4-fold degenerate Dirac nodes protected by bandtopology. Mining the Organic Materials Database, we present band structurecalculations and symmetry analysis for 6 previously synthesized organicmaterials. In all these materials, the Dirac nodes are well separated withinthe energy and located near the Fermi surface, which opens up a possibility fortheir direct experimental observation.

Data Mining for Three-Dimensional Organic Dirac Materials: Focus on Space Group 19