NMR Studies of Hydrated Sodium Tetraborate Minerals. II. Na23 Sites in Borax and Tincalconite

@inproceedings{Cuthbert1963NMRSO,
  title={NMR Studies of Hydrated Sodium Tetraborate Minerals. II. Na23 Sites in Borax and Tincalconite},
  author={John David Cuthbert and H. E. Petch},
  year={1963}
}
The quadrupolar splitting of the Na23 nuclear magnetic resonance signal has been studied in single crystals of borax, Na2B4O7·10H2O, and tincalconite, Na2B4O7·5H2O, placed in magnetic fields of 7536 and 5645 G, respectively. The resonance spectra show that the sodium atoms in both minerals occupy special positions with two unique sites in borax and three in tincalconite. The electric quadrupole coupling constants eqQ/h and asymmetry parameters η at these sites were determined to be… CONTINUE READING