The crystal structure of [ZnCl2(NH3)(2)], diamminedichloridozinc, was reinvestigated at low temperature, revealing the positions of the hydrogen atoms and thus a deeper insight into the hydrogen-bonding scheme in the crystal packing. In comparison with previous crystal structure determinations [MacGillavry & Bijvoet (1936). Z. Kristallogr. 94, 249-255; Yamaguchi & Lindqvist (1981). Acta Chem. Scand. 35, 727-728], an improved precision of the structural parameters was achieved. In the crystal, tetrahedral [Zn(NH3)(2)Cl-2] units (point-group symmetry mm2) are linked through N-H center dot center dot center dot Cl hydrogen bonds into a three-dimensional network.