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The crystal structures of the isotypic hydroxosulfitometalates NaM 2 OH(SO 3 ) 2  ·1H 2 O with M = Mg, Mn, Fe, Co, and Zn were determined by means of X-ray single crystal data (triclinic space group P1̄ - Q i  1 , Z = 2). The final R for the 2223, 2496, 2440, 1461, and 3433 observed reflections are 0.043, 0.068, 0.025, 0.055, and 0.028, respectively. The bivalent metal ions (three types) are octahedrally coordinated by the oxygen atoms of adjacent SO 3  2-  ions (two types, both monodentate), OH -  groups, and water molecules. The arrangement of the two OH -  groups is trans, and of OH -  and H 2 O cis with respect to the octahedral coordination. The mean metal oxygen distances are in the order M - OH 2  &gt; M -OSO 2  2- &gt; M - OH . The MO 6  -octahedra are both vertex and edge sharing, forming two-dimensional networks parallel to (010), which are connected via hydrogen bonds. The water molecules form strong, linear, nearly symmetric (mm 2) hydrogen bonds to SO 3  2-  ions, the hydroxide ions weak bonds to water molecules.

zeitschrift für naturforschung b

Kristallstrukturen von NaMg 2 OH(SO 3 ) 2  · H 2 O, NaMn 2 OH(SO 3 ) 2  · H 2 O , NaFe 2 OH(SO 3 ) 2  · H 2 O, NaCo 2 OH (SO 3 ) 2  H 2 O und NaZn 2 OH(SO 3 ) 2 H 2 O/ Crystal Structures of NaMg 2 OH(SO 3 )2-H 2 O, NaMn 2 OH(SO 3 ) 2  · H 2 O,NaFe 2 OH(SO 3 ) 2 H 2 O, NaCo 2 OH(SO 3 ) 2  · H 2 O, and NaZn 2 OH(SO 3 ) 2  · H 2 O