Table 4.

VNIR peak positions

Hem100915				0.537	0.672	0.881	1.003	1.428	1.795	1.935
α-Fe	O a	0.380	0.404	0.444	0.529	0.649	0.884
Originb,c	6A1→4E	6A1→4T2	6A1→4E4A1	2(6A1→4T1)	6A1→4T2	6A1→4T1				OH/H2O comb
Goet011515	0.374			0.484	0.678	0.968		1.449	1.774	1.940	2.332	2.397
Goet012315	0.395			0.485	0.675	0.957		1.446	1.777	1.940
α-FeOOHa	0.364		0.434	0.480	0.649	0.917
Originb,c	6A1→4E		6A1→4E4A1	2(6A1→4T1)	6A1→4T2	6A1→4T1		OH stretch ot		OH/H2O comb
Lep030415	0.414			0.482	0.726	0.978		1.453	1.818	1.930	2.207	2.477
γ-FeOOHa	0.359		0.434	0.485	0.649	0.961
Originb,c	6A1→4E		6A1→4E4A1	2(6A1→4T1)	6A1→4T2	6A1→4T1				OH/H2O comb
Ak102315	0.387		0.428	0.512	0.650	0.970		1.456		1.966	2.324	2.452
β-FeOOHb,d				0.502b		0.908b		1.458d		1.984d	2.324d	2.457d
Originb,d				2(6A1→4T1)		6A1→4T1		OH, H2O stretch ot		H2O comb	OH cb	OH cb
Mag060516						1.049
Fe3O4a								1.400
Originb							CT
Magh061815				0.472
γ-Fe2O3a			0.434	0.510	0.666	0.934
Originb			6A1→4E4A1	2(6A1→4T1)	6A1→4T2	6A1→4T1
Fh						0.966		1.403	1.796	1.933	2.296
5Fe2O3.9H2Oe			0.410	0.492	0.716	0.972
Originc,e			6A1→4E4A1	2(6A1→4T1)	6A1→4T2	6A1→4T1		OH stretch ot		OH/H2O comb

Site symmetries and participating atoms are listed where known

Errors in peak positions are smaller than the resolution of the measurement (3 nm) but can vary substantially with continuum removal method. See text for more details

CT charge transfer, ot overtone, cb combination band

^aSherman and Waite (1985)

^bCornell and Schwertmann (2006)

^cHunt et al. (1971)

^dBishop et al. (2015)

^eScheinost et al. (1998)