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The crystal structure of hibbingite, natural γ-Fe2+2Cl(OH)3, a mineral of the atacamite group, was studied on a sample from the Oktyabr’sky mine, Norilsk district, Siberia, Russia. The structure was solved by direct methods based on single crystal X-ray diffraction data and refined to R=2.07% [520 reflections with I>2σ(I)]. The mineral is isostructural with atacamite and is orthorhombic, Pnma, a=6.3373(2), b=6.9892(2), c=9.3457(3) Å, V=413.95(3) Å3, Z=4. The structure contains Fe(1)(OH)4Cl2 octahedra which share Cl–O(1) edges to form chains running along the b axis and cross-linked by the chains of Fe(2)(OH)5Cl octahedra sharing O(2)–O(2) edges and running along the a axis.