Low‐Temperature Synthesis, Characterization, and Stability of Spinel‐Type Li2NiF4 and Solid‐Solutions Li2Ni1–xCoxF41. Issue 2 (18th December 2012)

• Record Type: Journal Article
• Authors: Kohl, Julia; Nakhal, Suliman; Ferro, Noel; Bottke, Patrick; Wilkening, Martin; Bredow, Thomas; Heitjans, Paul; Lerch, Martin
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 639:Issue 2(2013)
• Page Start: 326
• Page End: 333
• Publication Date: 2012-12-18
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201200455
• Languages: English
• ISSNs: 0044-2313

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A new synthesis route to Li₂NiF₄ based on a fluorolytic process using Ni(acac)₂ or Ni(OAc)₂<bold>·</bold>4H₂O as precursor is presented. Variation of the synthesis conditions allows crystallite size control of the obtained powders. ⁶Li and ⁷Li MAS NMR experiments were carried out to study local environments of the lithium ions. Several attempts were made to synthesize Li₂CoF₄, which are, unfortunately, hitherto not successful. Nevertheless, our studies clearly reveal that solid solutions Li₂NiF₄–Li₂CoF₄ are stable up to ca. 30 % cobalt. High‐temperature X‐ray diffraction measurements also show no evidence for the existence of pure Li₂CoF₄. These findings are supported by quantum chemical calculations.</p> </abstract>