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Ca2 AuN: A Nitride Containing Infinite Zigzag Gold Chains.

Paul F Henry1, Mark T Weller1

  • 1Department of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ (UK)., Fax: (+44) 1703-593592.

Angewandte Chemie (International Ed. in English)
|May 2, 2018
PubMed
Summary

Researchers synthesized a new ternary auride nitride, calcium gold nitride (Ca$_{2}$AuN), under high pressure. This novel material features unique zigzag chains of gold atoms stabilized by calcium nitride octahedra.

Keywords:
CalciumGoldNeutron diffractionNitridesSolid-state structures

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Area of Science:

  • Solid-state chemistry
  • Inorganic chemistry
  • Materials science

Background:

  • Calcium nitride (Ca$_{3}$N$_{2}$) is a known compound.
  • Ternary auride nitrides are of interest for their unique electronic and structural properties.

Purpose of the Study:

  • To synthesize and characterize a novel ternary auride nitride containing calcium and gold.
  • To investigate the structural features of the new compound.

Main Methods:

  • High-pressure synthesis technique.
  • Reaction of solid Ca$_{3}$N$_{2}$ with gold in a nitrogen atmosphere.

Main Results:

  • Successful synthesis of the ternary auride nitride Ca$_{2}$AuN.
  • Characterization revealed infinite, planar zigzag chains of gold atoms with short Au-Au bond lengths (2.857(1) Å).
  • The gold chains are structurally supported by corrugated layers of edge-sharing calcium nitride octahedra (Ca$_{6}$N).

Conclusions:

  • Ca$_{2}$AuN represents a new class of ternary auride nitrides.
  • The unique chain structure of gold within the material is stabilized by the surrounding calcium nitride framework.