Crystal structure of monomethylammonium monochlorodibromomercurate(II) |
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| Authors: | R Ben Hassen A Ben Salah A Daoud and T Jouini |
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| Institution: | (1) Faculté des Sciences de Sfax, Laboratoire de Chimie du Solide, 3038 Sfax, Tunisie;(2) Département de Chimie, Faculté des Sciences de Tunis, 1060 Campus Universitaire, Tunis, Tunisie |
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| Abstract: | The crystal structure of monomethylammonium monochlorodibromomercurate (II) was refined from single crystal X-ray data including
the fractional contribution of centrosymmetric domains. The refinement converged toR=0.05 in space groupC2. The fraction of structure and its inverse were detected in the refinement. The structure is one-dimensional consisting of
distorted tetrahedra (HgCl2Br2) connected together by chlorine atoms, The CH3NH
3
+
groups are connected to the chains by hydrogen bonds to the halogen atoms contributing to the cohesion of the crystal. |
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| Keywords: | Ferroelectricity chains polar group disorder distored tetrahedra |
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