approaches 10% of the Larmor frequency  L . Widdifield, Bain, and Bryce showed that even under these conditions, second-order theory would introduce underestimation errors in C Q and  iso . For large values of  Q , the line between NMR and NQR is blurred. The exceptionally large nuclear electric quadrupole moments of In and 209 Bi -the largest of all main group elements -are expected to lead to noticeable third-order effects on the satellite transitions of these nuclei in distorted environments.