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The crystal structure of mercury(I) sulfate (or mercurous sulfate), Hg 2 SO 4 , was re-determined based on modern CCD data. In comparison with the previous determination from Weissenberg film data [Dorm (1969  ▶ ).  Acta Chem. Scand.   23 , 1607–1615], all atoms were refined with anisotropic displacement parameters, leading to higher precision in terms of bond lengths and angles [ e.g . Hg—Hg = 2.5031 (7) compared to 2.500 (3)Å]. The structure consists of alternating rows along [001] of Hg 2   2+  dumbbells (generated by inversion symmetry) and SO 4   2−  tetra­hedra (symmetry 2). The dumbbells are linked  via  short O—Hg—Hg—O bonds to the sulfate tetra­hedra into chains extending parallel to [20-1]. More remote O—Hg—Hg—O bonds connect these chains into a three-dimensional framework.

Crystal structure of Hg2SO4– a redetermination

Crystal structure of Hg₂SO₄– a redetermination