Nickel Bicarbonate Revealed as a Basic Carbonate. Issue 36 (30th November 2015)

• Record Type: Journal Article
• Authors: Rincke, Christine; Bette, Sebastian; Dinnebier, Robert E.; Voigt, Wolfgang
• Is Part Of: European journal of inorganic chemistry. Issue 36(2015)
• Page Start: 5913
• Page End: 5920
• Publication Date: 2015-11-30
• Subjects: Nickel -- Carbonates -- Hydrothermal synthesis -- Structure elucidation -- Thermal analysis; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201501094
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: A new basic nickel carbonate Ni12 (CO3 )8 (OH)8 · ( x – 1)H2 O or Ni12 (CO3 )8 (OH)6 O· x H2 O ( x = 6–8) was synthesized by two hydrothermal methods. The crystal structure was determined in the cubic space group P $\bar {4}$ 3 m (215) with a = 8.3814(2) Å 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. Abstract : The crystal structure of Ni12 (CO3 )8 (OH)8 · ( x – 1)H2 O or Ni12 (CO3 )8 (OH)6 O· x H2 O ( x = 6–8) consists of cages that contain several zeolite‐like water molecules. The title compound is proven to be a pure carbonate and not nickel hydrogen carbonate, as was assumed before.