Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Phase Formation and Solubilities in the Ternary System Ni(OH)2-NiCl2-H2O at 25 and 200°C


Dinnebier,  R. E.
Scientific Facility X-Ray Diffraction (Robert E. Dinnebier), Max Planck Institute for Solid State Research, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Bette, S., Pannach, M., Dinnebier, R. E., & Freyer, D. (2017). Phase Formation and Solubilities in the Ternary System Ni(OH)2-NiCl2-H2O at 25 and 200°C. European Journal of Inorganic Chemistry, 2017(11), 1488-1497.

Cite as: https://hdl.handle.net/21.11116/0000-000E-D09C-7
The solid/liquid equilibria in the ternary system Ni(OH)(2)-NiCl2-H2O at temperatures of 25 and 200 degrees C have been investigated by applying equilibration periods of up to 45 months (3 years and 9 months). The equilibration process was studied by isothermal saturation methods using different solids as starting materials. At 200 degrees C, Ni2Cl(OH)(3) and NiCl(OH) occur as stable phases, whereas a solid solution, NiClx(OH)(2-x) (ss-type-OH), appears as an intermediate phase. At 25 degrees C, two nickel(II) chloride hydroxide hydrates, Ni3Cl2+x(OH)(4-x)center dot 4H(2)O and Ni3Cl(OH)(5)center dot 4H(2)O, are formed. The latter phase was characterized for the first time and a structural model was created from a Rietveld refinement of the powder X-ray diffraction pattern. A systematic investigation of the solubilities at 25 degrees C revealed that Ni2Cl(OH)(3) is the solid phase in both dilute and concentrated NiCl2 solutions at this temperature. In general, all stable and metastable phases in the system Ni(OH)(2)-NiCl2-H2O exhibit very low solubility, but during the very slow phase transformations high hydroxide supersaturations occur that are persistent for years.