Table 2. Positions of Features Related to Hydrated Silicates (e.g., Clay Minerals) in Samples From the Bulk Rock Compared With Band Centers for End-Member Smectite Compositionsa


Sample	2nuOH (mum)	nuOH + Deltam-OH (mum)	2nuOH (mum)	nuSi-O (cm-1)	Delta(Al,Si)-Si-O (cm-1)

hvalfj011	1.415	2.297, 2.319	2.76	1038	527sh, 472
hvalfj017	1.415	2.215	2.76	1045	520, 466
hvalfj025	1.425	2.293	2.792	1061	519, 448
hvalfj054	1.42	2.298	(broad)	1042-1034	538sh, 460
icel009	1.410, 1.440	2.302	2.81	1053, 987	500, 453
icel010	1.410, 1.440	2.302	2.81	1185, 1024	-
Nontronite	1.43	2.28-2.29	2.80	1056-1068	510-515, 455-440
Saponite	1.38-1.39	2.31-2.32	2.72	1037	475-480
Montmorillonite	1.41	2.21	2.76	1055-1070 (1137)	525-535, 470-475

aBand centers were determined from continuum removed spectral data.