Near-Infrared Spectroscopic Study of Chlorite Minerals

Table 3

Comparison of the infrared spectra used in this study with IR, IES (infrared emission spectra), and Raman spectra from other chlorite studies.

IR (this study)	IR (Kloprogge and Frost [33])	IES (Kloprogge and Frost [33])	Raman (Prieto et al. [29, 30])	Assignment
432	435		438	(Fe,Mg)-O-Si bend
472	459		466	ν3Si-O
555	544	541	548	Al-O-Si
649	653	667	659	ν2Si-O
757	760	759	775	(SiAl)O-OH bend
850	818	802	814	(AlAl)O-OH bend
	904	885	903	OH bend
956	943	925		Inner OH bend
1030	1030	1034	1033	Si-O stretch
1060	1150	1086	1094	Si-O stretch
3423	3419	3450	3462	(SiAl)O-OH stretch
3554	3553	3560	3585	(AlAl)O-OH stretch
3662	3635	3645	3665	Inner OH stretch