pymatgen-materials

To retrieve band gap and formation energy for crystal structure analysis, query the Materials Project API using MPRester. This requires a valid MP_API_KEY to fetch electronic-structure summaries and stability metrics for inorganic materials.

To assess material stability in a composition space, construct a phase diagram using pymatgen's PhaseDiagram functionality. This evaluates the e_above_hull metric to determine whether candidate polymorphs are thermodynamically stable.

Yes, you can parse CIF, POSCAR, and XYZ files to detect space group symmetry. The SpacegroupAnalyzer tool determines conventional and primitive cells from loaded crystal structures for downstream materials-science screening.

Yes, an MP_API_KEY is required to compute formation energy and e_above_hull metrics. The mp-api dependency utilizes this key within MPRester to authenticate and retrieve stability data from the Materials Project database.

The best way to prepare crystal structures for downstream DFT workflows is by applying structural transformations in pymatgen. You can build supercells, apply substitutions, and generate phase-diagram-ready objects to screen candidate materials.