Layered ternary transition metal nitrides; synthesis, structure and physical properties

Duncan H. Gregory, Paul M. O'Meara, Alexandra G. Gordon, Daniel J. Siddons, Alexander J. Blake, Marten G. Barker, Thomas A. Hamor, Peter P. Edwards

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


Two-dimensional structures are an emerging class of materials within nitride chemistry. We report here our systematic studies of two groups of these layered compounds: 1 Lithium transition metal compounds, Li3-x-yyMxN (M = Co, Ni, Cu, □ = Li vacancy) and 2 ternary transition metal nitrides of general formulation AMN2 (A = alkaline earth metal, M = Ti, Zr, Hf). Compounds in class 1 are based on the hexagonal Li3N structure, unique to nitrides. Compounds in group 2, by contrast, crystallise with oxide structures (α-NaFeO2 or KCoO2). Specific and unusual synthetic methods have been developed to reproducibly prepare these compounds. Compounds in series 1 contain ordered or disordered Li vacancies at increased levels relative to the parent Li3N, itself a Li+ fast ion conductor. Nitrides in series 2 should be nominally diamagnetic (S = 0), yet magnetic measurements reveal behaviour seemingly inconsistent with this assumption.

Original languageEnglish
Pages (from-to)237-244
Number of pages8
JournalJournal of Alloys and Compounds
Publication statusPublished - Apr 12 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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