Table 1. Comparison of observed (obs.) and theoretical (theor.) intensities of three components of the Si NMR spectra of synthetic phyllosilicates as expected from a single Al/Si sheet.

Al/(Al+Si)	, obs. (theor.)	, obs. (theor.)	, obs. (theor.)
0.12	0 (0)	39 (41)	61 (59)
0.15	4 (0)	44 (53)	52 (47)
0.20	10 (0)	55 (75)	35 (25)
0.26	24 (0)	57 (100)	19 (0)