29Si MAS T1 values of silica containing 2.1 % of alumina
Inversion-recovery T1 experiment performed with 4-mm diameter rotor spinning at 10 kHz; NS = 80 and D1 = 240 s; SFO1 = 99.367 MHz.
tau values in seconds: 0.1, 5, 10, 20, 30, 50, 80, 100, 150
T1 value of Q2:
T1 value of Q3:
T1 value of Q4:
