Table 2.

IR ratios and mechanical stiffnesses computed from the average localized AFM-IR spectra from inertinite, solid bitumen, and Tasmanites in immature New Albany Shale

Maceral-specific chemical composition and mechanical properties	Aromaticity	CH3/CH2	C-factor	A-factor	Average contact resonance frequency (kHz)
Inertinite	0.1	1.97	0.29	0.37	182.1 ± 1.7
Solid bitumen	0	1.24	0.42	0.41	178.8 ± 3.6
Tasmanites	0	0.63	0.70	0.57	177.2 ± 4.3