Cs nucleus undergoes a significant change near 375 K, which coincides with the change in the splitting of the 133 Cs resonance lines. The change in T 1 near T C is related to the loss of H 2 O, and means that the forms of the octahedra of water molecules surrounding Cs + are disrupted.

Rb nuclei in the crystals were found to increase with increasing temperature, and can be described by the relation T 1The dominant relaxation mechanism for these nuclei with electric quadrupole moments is provided by the coupling of these moments to the thermal fluctuations of the local electric field gradient via Raman spin-phonon processes.