Direct high-field NMR spectroscopy of powder samples is employed to measure the 39K nuclear quadrupolar coupling parameters, e2qQ/h and η, in 16 common inorganic potassium salts. It is shown that high-field NMR powder spectroscopy of 39K gives clear compound characterisation and is particularly well suited as a technique for monitoring phase transitions in potassium compounds.
T. J. Bastow, J. Chem. Soc., Faraday Trans., 1991, 87, 2453 DOI: 10.1039/FT9918702453
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