Fig. 4: Scheme of static NMR powder pattern lineshapes for two different values of the asymmetry parameter, ηCSA.
From: Enabling materials informatics for 29Si solid-state NMR of crystalline materials
For values of ηCSA less than ~0.7, there is an unambiguous assignment of δZZ and δXX tensor components. However, for ηCSA values of ~0.7 to 1.0, the determination between the tensors elements can be mis-assigned.
