Crystal structure of triethylentetraammonium bis monohydrogen-monophosphate dihydrate beta-NH3(CH2)(2)NH2(CH2)(2)NH2(CH2)(2)NH3(HPO4)(2)center dot 2H(2)O

The salt triethylentetraammonium bis monohydrogen-monophosphate dihydrate i s orthorhombic Pbca with unit cell dimensions a = 8.963(2), b = 10.326(2), c = 17.381(4)Angstrom; Z = 4; D-m = 1.540 g cm(-3); D, = 1.562 g cm(-3). Th e examination of the structure shows a layer arrangement parallel to the (c ) over bar axis: planes of [HPO4](2-) tetrahedra alternate with planes of [ (NH3(CH2)(2)NH2CH2)(2)](4+). The [HPO4](2-) tetrahedra are connected throug h O(W)s-H ... O hydrogen bonds, so that infinite chains of the composition [HPO4(H2O)](n)(2n-) are formed in the structure parallel to the (b) over ba r axis. The structure of this compound is built from [HPO4](2+) anions, [(N H3(CH2)(2)NH2CH2)(2)](4+) cations and zeolitic water molecules connected by hydrogen bonds.