Christine Rincke, S. Bette, R. Dinnebier
Dec 1, 2015
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Influential Citations
8
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Journal
European Journal of Inorganic Chemistry
Abstract
A new basic nickel carbonate Ni12(CO3)8(OH)8·(x – 1)H2O or Ni12(CO3)8(OH)6O·xH2O (x = 6–8) was synthesized by two hydrothermal methods. The crystal structure was determined in the cubic space group P3m (215) with a = 8.3814(2) A by laboratory high-resolution X-ray powder diffraction with the application of global optimization methods and Rietveld refinement. The crystal structure consists of edge-linked [NiO6] octahedra and carbonate units that form cages. The interconnected cages form channels filled with disordered water molecules. This causes a zeolite-like behavior of the water molecules, as shown by thermogravimetric analysis coupled with infrared spectroscopy (TG–IR) and in situ X-ray powder diffraction experiments up to 300 °C. In addition, the title compound was characterized by elemental analysis, scanning electron microscopy, and Raman and UV/Vis spectroscopy. The title compound was proven to be a pure carbonate and not nickel hydrogen carbonate (PDF 15-0782), as was assumed before.