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FAPbI₃ typically exists in two polymorphs: fapbi3 cif file
A is the standard format for exchanging crystallographic data. It contains everything needed to reconstruct the 3D lattice of a material, including: Unit cell dimensions (a, b, c) and angles ( Space group symmetry (e.g., Pm3m for cubic FAPbI₃). Do not trust random GitHub repositories
Visualizing the CIF file allows researchers to see the "tilt" of the PbI6cap P b cap I sub 6 including: Unit cell dimensions (a
-FAPbI3 (Black phase) : The cubic perovskite structure (space group ) used for high-efficiency solar cells.