An X-ray Study on the Structure of Cobalt Dichloride Hexahydrate
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概要
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The crystal structure of CoCl_2・6H_2O has been determined by the X-ray single crystal method. The unit cell is monoclinic with a=10.34A, b=7.06A, c=6.67A and β=122゜20'. The space group is C^2_<2h>-C2/m and the unit cell contains two molecules. Two Cl^- ions and four water molecules are octahedrally coordinated to Co^<2+> ion to form the group [CoCl_2・4H_2O]. These groups are held together parallel to the b axis by O…H-O type hydrogen bonds. The other two water molecules of the formula unit are far from Co^<2+> ion. The crystal has the layer structure parallel to (001), and this causes the perfect cleavage. The structure proposed for this salt by Stroganov et al. seems to be incorrect.
- 東北大学の論文
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