Synthesis of Li2PtH6 using high pressure: Completion of the homologous series A2PtH6 (A=alkali metal)

Kati Puhakainen, Emil Stoyanov, Michael J. Evans, Kurt Leinenweber, Ulrich Hussermann

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Li2PtH6, the missing member of the complex transition metal hydride series A2PtH6 (A=alkali metal), was prepared by reacting mixtures of LiH and Pt in the presence of BH 3NH3 as hydrogen source at pressures above 8 GPa. According to powder X-ray diffraction analysis, Li2PtH6 is isostructural to its heavier homologues and crystallizes in the cubic K 2PtCl6 structure (space group Fm3̄m, a=6.7681(3), Z=4). However, PtH62- octahedral complexes in Li 2PtH6 approach each other closely and its structure may likewise be regarded as a defective perovskite structure where half of the octahedrally coordinated atoms (cations) are missing. The IR spectrum of Li 2PtH6 reveals the PtH T1u stretch and bend at 1840 and 889 cm-1, respectively.

Original languageEnglish (US)
Pages (from-to)1785-1789
Number of pages5
JournalJournal of Solid State Chemistry
Volume183
Issue number8
DOIs
StatePublished - Aug 1 2010

Keywords

  • Complex transition metal hydrides
  • High pressure materials synthesis
  • Multi-anvil techniques

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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