Deuteron magnetic resonance and hydrogen bond network of ammonium trihydrogen selenite

The DMR spectra of single-crystal ND₄D₃(SeO₃)₂ have been studied. The principal values and the direction cosines of the field-gradient tensor of deuterons located on three nonequivalent O · · · O hydrogen bonds have been determined. The lengths of hydrogen bonds have been calculated from $\text{eQq}\text{h}$ values; the deuterons have been located on hydrogen bonds. The comparison with the DMR data of isomorphous compound RbD₃(SeO₃)₂ was made; the influence of NH · · · O hydrogen bonds on the structural parameters O · · · O hydrogen bonds is discussed.