New potential open-framework materials in gallophosphate systems. Preparation and crystal structure of [NH3(CH2)3NH3]Ga3(PO4)3(OH)2·H2O and [NH2(CH2)3NH2]Ga3(PO4)3(H2O)

The synthesis and the structure of two new gallium phosphates [NH3(CH2)3NH3]Ga3(PO4)3(OH)2·H2O (GaP1) space group Pcab, a = 10.043(3), b = 15.989(4), c = 18.308(6) Å and [NH2(CH2)3NH2]Ga3(PO4)3(H2O) (GaP2) space group Pbc21, a = 8.903(3), b = 9.697(3), c = 16.326(7) Å are presented. The syntheses were realised under hydrothermal conditions at 200 °C in the system Ga2O3–H3PO4–1,3-diaminopropane–H2O. These two compounds crystallise with a 3D-framework, with localised channels. In the GaP2 structure, 1,3-diaminopropane (1,3-DAP) is, unusually, coordinated to a gallium atom.