A re-interpretation of the crystal structure of ‘(NH4)2(NH3)[Ni(NH3)2Cl4]’ in terms of (NH4)2−2z[Ni(NH3)2]z[Ni(NH3)2Cl4] |
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| Authors: | A. Leineweber |
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| Affiliation: | Max Planck Institute for Metals Research∗∗∗∗Max Planck Institut für Metallforschung., Heisenbergstraße 3, D-70569 Stuttgart, Germany |
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| Abstract: | A re-interpretation and re-evaluation of single-crystal X-ray diffraction data of a previously reported ‘(NH4)2(NH3)[Ni(NH3)2Cl4]’ (J. Solid State Chem. 162 (2001) 254) give a new formula (NH4)2−2z[Ni(NH3)2]z[Ni(NH3)2Cl4] with z=0.152. This new formula results from defects in an idealized ‘(NH4)2[Ni(NH3)2Cl4]’ basic structure, where two adjacent NH4+ cations are replaced by one Ni(NH3)22+ unit. Cl− anions from the basic structure complete the coordination sphere of the new Ni2+ to [Ni(NH3)2Cl4]2−. |
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| Keywords: | Ammines Crystal structure Ammonium chloride Defects Solid solution |
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