Table 3. Mössbauer Parameters of Calcined Catalysts of Spectra Recorded at −269 °C^a,^b.

sample	IS (mm s–1)	QS (mm s–1)	H (T)	Γ (mm s–1)	phase	spectral contribution (%)
Fe-HMc	0.35	0.40	53.6†	0.28	α-Fe2O3	100
Cr-HMc	0.36	–0.21	52.7†	0.26	α-Fe2O3	100
CrCu-HMc	0.36	–0.21	53.4	0.29	α-Fe2O3	14
	0.36	–0.04	48.9	0.48	Fe5HO8·4H2O	86
Al-HM	0.35	–0.14	53.1	0.34	α-Fe2O3	17
	0.35	–0.05	48.3†	0.42	Fe5HO8·4H2O	83
AlCu-HM	0.37*	–0.21*	52.8	0.31	α-Fe2O3	5
	0.35	–0.05	48.2†	0.46	Fe5HO8·4H2O	95
Ga-HM	0.36	–0.18	52.5†	0.30	α-Fe2O3	100
GaCu-HM	0.37*	–0.21*	53.0	0.35	α-Fe2O3	19
	0.35	–0.05	48.7†	0.38	Fe5HO8·4H2O	81
In-HM	0.37	–0.14	52.9	0.30	α-Fe2O3	7
	0.35	–0.04	48.2†	0.42	Fe5HO8·4H2O	93
InCu-HM	0.37*	–0.21*	52.7	0.30*	α-Fe2O3	4
	0.35	–0.03	48.0†	0.45	Fe5HO8·4H2O	96
Mn-HM	0.36	–0.19	53.2	0.33	α-Fe2O3	40
	0.36	–0.07	48.4†	0.40	Fe5HO8·4H2O	60
MnCu-HM	0.37	–0.21*	52.9	0.34	α-Fe2O3	17
	0.35	–0.05	48.4†	0.44	Fe5HO8·4H2O	83
Zn-HM	0.36	–0.18	53.2	0.33	α-Fe2O3	35
	0.36	–0.08	48.8†	0.40	Fe5HO8·4H2O	65
ZnCu-HM	0.38	–0.21*	53.0	0.33	α-Fe2O3	10
	0.36	–0.02	48.0†	0.49	Fe5HO8·4H2O	90
Nb-HM	0.35	–0.17	52.8	0.40	α-Fe2O3	25
	0.35	–0.05	48.0†	0.51	Fe5HO8·4H2O	75
NbCu-HM	0.39	–0.21*	52.9	0.34	α-Fe2O3	9
	0.35	–0.03	47.9†	0.48	Fe5HO8·4H2O	91

^aFixed values are marked with * and average values with †.

^bExperimental uncertainties: Isomer shift: IS ± 0.01 mm s^–1, quadrupole splitting: QS ± 0.01 mm s^–1, line width: Γ ± 0.01 mm s^–1, hyperfine magnetic field: H ± 0.1 T, spectral contribution: ±3%.

^cFrom ref (6).