Diethyl­enetriaminium hexa­fluoro­aluminate dihydrate

The title compound, (C₄H₁₆N₃)[AlF₆]·2H₂O, was obtained under solvothermal conditions at 463 K for 48 h, involving in situ generation of diethyl­enetriamine from tris­(2-amino­ethyl)amine. The structure has been determined by single-crystal X-ray diffraction. The [AlF₆]^3- anions and triproton­ated amine cations build infinite layers, which are hydrogen-bonded to water mol­ecules.