Synthesis and structure of the ternary and quaternary strontium nitride halides, Sr2N(X, X′) (X, X′=Cl, Br, I)

Amy Bowman, Ronald I. Smith, Duncan H. Gregory

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17 Citations (Scopus)


A number of new, layered nitride mixed halides have been synthesised in the quaternary phase systems Sr-N-Cl-Br and Sr-N-Br-I. The variation in structure with composition has been investigated by powder X-ray and powder neutron diffraction techniques and the structure of strontium nitride iodide, Sr 2NI, has been determined for the first time (rhombohedral space group R-3m, a=4.0103(1)Å, c=23.1138(2)Å, Z=3). A continuous solid solution exists between Sr2NCl and Sr2NBr with intermediate compounds adopting the same anti-α-NaFeO2 structure (rhombohedral space group R-3m) as the ternary end members. A similar smooth and linear relationship between structure and composition is seen from Sr2NBr to Sr2NI and hence cubic close packing of metal-nitrogen layers is adopted regardless of halide, X (X′). While nitride and halide anions occupy distinct crystallographic sites, there is no ordering of the halides in the quaternary materials irrespective of stoichiometry or temperature (between 3 and 673 K).

Original languageEnglish
Pages (from-to)130-139
Number of pages10
JournalJournal of Solid State Chemistry
Issue number1
Publication statusPublished - Jan 1 2006

All Science Journal Classification (ASJC) codes

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

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