Structural and phase equilibria studies in the system Pt-Fe-Cu and the occurrence of tulameenite (Pt2FeCu).

M. Shahmiri, S. Murphy, D. J. Vaughan

Research output: Contribution to journalArticlepeer-review

Abstract

The crystal structure and compositional limits of tulameenite, formed either by quenching from above the critical T of 1178oC or by slow cooling, have been studied using XRD, TEM, DTA and microprobe techniques. The structure has Pt in the (000) and (1/21/20) lattice sites and Cu or Fe atoms randomly occupying the (1/201/2) and (01/21/2) sites. The resulting face-centred tetragonal structure undergoes a disordering transformation at the critical T to a postulated non-quenchable face-centred cubic structure. At 1000oC there is an extensive single-phase region of solid solution around Pt2FeCu, extending to the composition PtFe, but at 600oC the Pt2FeCu composition lies outside the reduced area of solid solution in a two-phase field.-R.A.H. Dept. of Metallurgy & Materials Engineering, Univ. of Aston, Birmingham B4 7ET, UK.

Original languageEnglish
Pages (from-to)547-554
Number of pages8
JournalMineralogical Magazine
Volume49
Issue number353
DOIs
Publication statusPublished - 5 Jul 1985

Keywords

  • Tulameeite
  • Syatem Pt-Fe-Cu
  • Crystal structure

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