Nuclear magnetic resonance of 14N in ammonium aluminum alum
- 1 March 1974
- journal article
- conference paper
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 60 (5) , 1952-1953
- https://doi.org/10.1063/1.1681299
Abstract
Nuclear quadrupole coupling constants eQVzz/h have been measured for 14N (196 kHz) in NH4Al(SO4)2 · 12H2O and 87Rb (12.9±0.1 MHz) in RbAl(SO4)2 · 12H2O. If we assume regular tetrahedral symmetry for the NH4 ion, such that the intraionic charges produce, aside from the effect of antishielding, zero effective electric field gradient at the N nucleus, then the ratio of the coupling constants implies an antishielding factor of about −4.Keywords
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