3.1 Author:
   Burkert, Paul K.; Grommelt, M.
Reference:
   Journal, ZNBSEN, Z.Naturforsch.B, GE, 43, 11, 1988, 1381-1385
Title:
   127I Solid-State NMR Investigations on (n-C4H9)4NIO4 and (n-C4H9)4PIO4
Abstract:
Tetrabutylammonium- and tetrabutylphosphonium-metaperiodate show 127I solid-state NMR second order quadrupole splittings with quadrupole coupling constants in the range of 2-8 MHz.The values of e2qQ/h and asymmetry parameter h reveal several phase transitions of first and second order.In (n-C4H9)4PIO4 an anomalous temperature coefficient with <*> = 0.32E-2 is observed.