High-temperature 23 Na MAS NMR experiments up to 873 K for a number of different sodalites (Na 8 [AlSiO 4 ] 6 (NO 3 ) 2 , Na 8 [AlSiO 4 ] 6 (NO 2 ) 2 , Na 8 [AlSiO 4 ] 6 I 2 , Na 7.9 [AlSiO 4 ] 6 (SCN) 7.9 ·0.5H 2 O, Na 8 [AlGeO 4 ] 6 (NO 3 ) 2 , and Na 7 [AlSiO 4 ] 6 (H 3 O 2 )·4H 2 O) were carried out. The spectra of the first five sodalites consist of a quadrupolar MAS pattern with different quadrupolar coupling constants. The quadrupolar interaction for the thiocyanate sodalite, the nitrate aluminosilicate, and germanate sodalite decreases strongly passing a coalescence state on heating, while the quadrupolar interaction of the iodide and nitrite sample shows nearly no change. The basic hydrosodalite shows an asymmetric lineshape at room temperature and, between 350 and 370 K, a second line due to the evaporation of cage-water emerges. The linewidth increases with rising temperature. The temperature dependence of the quadrupolar interaction seems to be a function of the sodalite β-cage expansion. Two conceivable jump mechanisms are proposed for a tetrahedral two-site jump between occupied and unoccupied tetrahedral sites.