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Acta Cryst. (2006). E62, i199-i200 [ doi:10.1107/S1600536806033952 ]
Abstract: The crystal structure of mercury(II) chromium(III) tetroxide has been redetermined from a single crystal grown from an HgO-CrO3 mixture at 743 K in an evacuated silica ampoule. The present investigation confirms the previous study, which was based on powder data [Wessels, Czekalla & Jeitschko (1998). Mater. Res. Bull. 33, 95-191], but with higher precision and with all displacement parameters refined anisotropically. HgCr2O4 adopts the normal 2-3-spinel structure, with mercury in one-eighth of the tetrahedral and chromium in one-half of the octahedral voids of the cubic closed-packed O atoms.
Online 25 August 2006
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