Selected Mössbauer fit parameters for the H-rich heteropolymer ferritin^a.

T (K)	Site	δ (mm s−1)	ΔEq (mm s−1)	H hf (kOe)	Area (%)	Core or shell
300	1	0.36	0.57	0	59	Core
	2	0.36	0.99	0	41	Shell
15	1	0.48	0.54	0	19.4	Core
	2	0.48	1.25	0	11.6	Shell
	3	0.48	0	484.2	46.9	Core
	4	0.48	0	434.2	22.2	Shell
4.2	3	0.50	0	488.2	59.5	Core
	4	0.45	0	446.0	40.5	Shell

^aSites 1 and 2 are associated with quadrupolar spectra (green and purple traces in Fig. 7). The reported parameters correspond to the average values of fitted quadrupole distributions. Sites 3 and 4 are associated with magnetic hyperfine spectra (blue and red traces in Fig. 7). The reported parameters correspond to the average values of fitted hyperfine field distributions. Estimated uncertainties: δ (±0.02 mm s⁻¹), ΔE_q (±0.04 mm s⁻¹), H_hf (±2 kOe), area (±3%).