Fe-N: 7 GGen candidate structures (≤150 meV/atom above hull)

7 stable or near-hull candidates in the Fe-N chemical system as CIF files, within 150 meV/atom of the convex hull, tetragonal only. Formulas: N, Fe12N, Fe8N, Fe4N, Fe5N, Fe4N2, +1 more. Each CIF carries provenance (GGen, Materials Project or Alexandria).