Look for high-temperature phase files or optimized structures. (Yellow Phase - Non-Perovskite) Structure: Hexagonal structure ( P63mccap P 6 sub 3 m c ) composed of face-sharing PbI6cap P b cap I sub 6 octahedra chains. Properties: Non-photoactive, yellow color.
(Formamidinium Lead Iodide) in its most common high-temperature (Cubic,
At temperatures exceeding $\approx$ 330 K, FAPbI$_3$ stabilizes in a cubic structure. fapbi3 cif file
: The framework consists of corner-sharing lead iodide octahedra. The bond lengths are typically around Phase Transition : The "yellow"
This "feature" is formatted as a standard Crystallographic Information File (CIF) that you can copy into software like VESTA, CrystalMaker, or PyMaw. CIF File Content: FAPbI3FAPbI sub 3 (Cubic Phase) CIF File Content: FAPbI3FAPbI sub 3 (Cubic Phase)
FAPBI3 CIF refers to the Crystallographic Information File (CIF) for the compound FAPBI3, a perovskite-like material with formula often written as FAPbI3 (formamidinium lead iodide). FAPbI3 is a widely studied hybrid organic–inorganic perovskite notable for its optoelectronic properties and use in high-efficiency perovskite solar cells and light-emitting devices.
can distort from cubic to tetragonal or trigonal at room temperature, even if it remains in the black perovskite phase. At temperatures exceeding $\approx$ 330 K
The yellow phase is inactive for light absorption in solar cells. Therefore, researchers often alter the CIF file—or use chemical doping (like incorporating methylammonium, cesium, or bromide) in the lab—to artificially "lock" the black -phase into place so it doesn't degrade. How Researchers Use the FAPbI Materials scientists and computational physicists use FAPbI CIF files for several high-tech workflows:
Silence.
The Formamidinium Lead Iodide ( FAPbI3FAPbI sub 3 ) CIF File: A Guide to Perovskite Crystal Structures Formamidinium lead iodide ( FAPbI3FAPbI sub 3