Die Kristallstruktur von Trikobalt(II)-dihydroxidsulfat-dihydrat,Co3(OH)2(SO4)2 · 2 H2O |
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Authors: | E Dubler H R Oswald |
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Abstract: | Tricobalt (II)-dihydroxidesulfate-dihydrate, Co3(OH)2(SO4)2 · 2H2O, is orthorhombic: a = 7.21, b = 9.77, c = 12.86 Å, V = 905.9 Å3, space group D -Pbcm with four formula units per cell. The atomic positions have been determined by threedimensional Patterson and Fourier synthesis and full-matrix least-squares refinement of single crystal X-ray diffraction data. The structure shows infinite chains 001] of Co? O octahedra sharing one edge with each other. These chains are linked together by alternating SO4 tetrahedra and additional Co? O octahedra, thus giving rise to a three-dimensional network of polyhedra. There is no similarity to the well known layer structures of most hydroxide salts of divalent metals. The SO4 tetrahedra are regular while the Co? O octahedra show considerable distortion. The water molecule is coordinated to one Co atom and bonded to sulfate oxygen by two weak hydrogen bridges. |
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