Extended Data Fig. 7: Mössbauer spectra.
From: Confinement of atomically defined metal halide sheets in a metal–organic framework
a, b, 57Fe Mössbauer spectra for 1(FeCl2)19 at 100 K (a) and 5 K (b). The data were fit with four high-spin octahedral Fe(ii) components (green), two high-spin four- and five-coordinate Fe(ii) components (red), and a magnetic hyperfine component (grey). Spontaneous oxidation leads to a high-spin Fe(iii) impurity (blue) visible at 5 K. Overall fits are depicted in black.
