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Die Kristallstruktur von Trikobalt(II)‐dihydroxidsulfat‐dihydrat, Co 3 (OH) 2 (SO 4 ) 2 · 2 H 2 O
Author(s) -
Dubler E.,
Oswald H. R.
Publication year - 1971
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19710540613
Subject(s) - chemistry , crystallography , orthorhombic crystal system , octahedron , tetrahedron , crystal structure , molecule , organic chemistry
Abstract Tricobalt (II)‐dihydroxidesulfate‐dihydrate, Co 3 (OH) 2 (SO 4 ) 2 · 2H 2 O, is orthorhombic: a = 7.21, b = 9.77, c = 12.86 Å, V = 905.9 Å 3 , space group D 11 2 h ‐ 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 CoO octahedra sharing one edge with each other. These chains are linked together by alternating SO 4 tetrahedra and additional CoO 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 SO 4 tetrahedra are regular while the CoO octahedra show considerable distortion. The water molecule is coordinated to one Co atom and bonded to sulfate oxygen by two weak hydrogen bridges.