NMR signals of 7Li, 23Na, 35C1, 39K , 79B r, 87R b and 127I have been measured in various alkali and halogen salt powders relative to well defined aqueous solutions. W ith the known shielding constants of some of these solutions the nuclear magnetic shielding constants of the alkali and chlorine nuclei in crystalline powders were evaluated in the atomic reference scale. The theoretical values of the shielding constants in alkali halides do not agree even in the order of magnitude with the experimental ones in some cases.For 23Na first-order and second-order quadrupole patterns have been observed and the quadru pole coupling constants are given.

Die NMR‐ Signale von 7Li, "Na, 39K, "Rb, 35Cl, 79Br und 127l werden in verschiedenen Salzkombinationen in Form von Kristallpulvern und in wäßriger Lösung gemessen.

In lyotropic mesophases of decylammoniumchloride the NMR signals of the alkali nuclei 6 Li, 7 Li, 23 Na, 39 K, 85 Rb, 87 Rb and 133 Cs solubilized in these mesophases have been observed. The linewidths of the signals are comparable with the linewidths in aqueous solutions. Apart from 6 Li and 39 K for all other alkali nuclei in the mesophases first-order quadrupole splitted spectra have been observed. For the rubidium isotopes 85 Rb and 87 Rb a ratio of the quadrupole splitting of 2.01 i 0.05 has been determined. Further the chemical shifts of the solubilized alkali nuclei relative to infinitely diluted aqueous solutions have been measured.