Mössbauer parameters for iron sites as found in Fe–NC and FeNi–NC.

	δ/mm s−1	ΔEQ/mm s−1	H 0/T	fwhm/mm s−1	Rel. area/%
Fe–NC
D1	0.37	0.99		0.61	27.4
D2	0.50	2.04		1.59	55.5
Singlet1	−0.04			0.34	4.9
Sext1	0.74		30.86	0.58	7.0
Sext3	0.18		21.01	0.27	5.2
FeNi–NC
D1	0.39	0.75		0.61	15.8
D2	0.50	2.15		1.1	18.5
Singlet1	0.42			0.52	15.1
Sext1	0.72		31.22	0.47	30.2
Sext2	−0.02		29.98	1.09	20.4