Fig. 4
From: Fast room temperature lability of aluminosilicate zeolites
The evolution of 29Si and 27Al MAS and cross-polarisation (CP) MAS NMR spectra over time. 29Si (a and b) and 27Al (c and d) MAS NMR (9.4 T, 10 kHz) spectra of the starting Al-CHA zeolite (a and c) and a slurry of 40% H217O Al-CHA slurry aged for b 137 days (MAS), 45 days (CP MAS) and d 202 days. In a and b the corresponding 1H/29Si CP MAS NMR spectra (5000 μs contact time) are shown overlaid in red
