gave a featureless resonance with a full-width at half-maximum of about 150 ppm, which did not add any information (not shown). Ga and Ga static spectra of BiGaTeO 6 showed powder lineshapes characteristic of second-order quadrupolar broadening with near axial symmetry (Figure ). The gallium spectra contain a number of overlapping sidebands at moderate MAS rates (10-15 kHz) that are much smaller than the CT linewidths; this problem is alleviated for Ga but not entirely for Ga at 35 kHz MAS (Figure ). In each case, the features under static and variable MAS rates could be readily simulated with second-order perturbation theory (Table ). The two gallium nuclei have a relative nuclear quadrupole moment ratio of Ga/ 71 Ga = 1.60, so collection of both datasets provides additional constraints for the simulations. The complementary datasets also enabled the estimation of the chemical shift anisotropy, albeit data from a higher B 0 field would improve the precision.