The Electric Quadrupole Splitting of the Nuclear Magnetic Resonance Lines of Sodium in a Single Crystal of Na₂S₂O₃·5H₂O

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Splitting of the nuclear magnetic resonance lines of sodium due to the nuclear electric quadrupole interaction was measured in a single crystal of sodium thiosulphate pentahydrate. Since each molecule contains two sodium nuclei which have different electric quadrupole interactions, and there are two groups of molecules with different orientations in a unit cell, twelve lines were observed in general. The experimental results were compared with the theoretical calculation of Bersohn and the values of e²qQ, η and the directions of the principal axes of the field gradient tensor were determined for each nucleus. The values of e²qQ and η are 2.26 Mc/sec and 0.334, and 0.830 Mc/sec and 0.41 respectively for two nuclei in the molecule.