2H and 133Cs nuclear magnetic resonance study of Cs3D(SO4)2 single crystals in laboratory and rotating frames

To understand the physical properties of Cs3D(SO4)2 single crystals, in which deuterium replaces hydrogen, the temperature dependence of the NMR spectrum and the spin–lattice relaxation times in the laboratory frame, T1, and in the rotating frame, T1ρ, for 2H and 133Cs are investigated using Fourier transform nuclear magnetic resonance spectrometry. Our results for the 2H and 133Cs relaxation times provide no evidence of a phase transition. The strong temperature dependence of the 2H resonance lines is associated with deformation of the H(SO4)2− tetrahedra. Further, T1 and T1ρ for the 2H and 133Cs nuclei are governed by different mechanisms, which we discuss in terms of fast and slow motion.