Abstract
The structural properties and relaxation mechanisms of Li 2KH(SO 4) 2 crystals were determined using the temperature dependences of NMR spectra and the spin–lattice relaxation times ( T 1) of their 1H, 7Li, and 39K nuclei. The results obtained were compared with the previously reported physical properties of LiKSO 4 crystals. The substitution of the potassium ions with protons in the LiKSO 4 crystals were variations in the phase transition temperatures, and the non-appearance of ferroelastic properties. The 7Li T 1 for the Li 2KH(SO 4) 2 crystals was much shorter than the 7Li T 1 for the LiKSO 4 crystals, and these findings indicate that the presence of the protons in Li 2KH(SO 4) 2 causes the Li ions to move with greater freedom.
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