Samples of tridimensional microporous zinc phosphates with fully connected framework with faujasite (FAU) and chiral zincophosphate (CZP) structures have been prepared and characterized by thermal analyses comprising TGA, TGA-MS and in situ thermal XRD. They have been also characterized by ICP and C-13 MAS NMR. Analyses of the ZnPO-FAU demonstrate that the tetramethylammonium (TMA(+)) cations are incorporated preferentially in the P-cages and that this material is stable up to 673 K. The crystallinity of the sample only decreases when the TMA+ cations located in the P-cages are eliminated (above similar to 723 K). In the case on ZnPO-CZP the thermal removal of the water more strongly held by the structure produces a marked decrease of crystallinity at similar to 523 K