The Crystal Structure of Nickel Chloride Hexahydrate, NiCl₂·6H₂O

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The crystal structure of NiCl₂·6H₂O has been determined by the X-ray single crystal method. The unit cell is monoclinic with a=10.23 Å, b=7.05 Å, c=6.57 Å and β=122°10′. The space group is C_2h³–C2⁄m and the unit cell contains two formula units. The atomic arrangement is quite the same as that of CoCl₂·6H₂O and thus the structure model adopted for this salt has again been confirmed to be correct, as compared with the model proposed by Stroganov et al..