The ternary Zr-Pt-Sb system

  • Tkachuk A
  • Mar A
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The isothermal cross-section of the phase diagram of the ternary Zr-Pt-Sb system in the whole concentration range at 600 °C has been investigated by means of X-ray analysis. The samples were prepared by arc-melting of the pure elements under argon atmosphere with further annealing in evacuated silica tubes at 600 °C for 720 h followed by quenching in cold water. Five new compounds were discovered in this system: Zr6PtSb2(Zr6CoAl2-type, P over(6, ̄) 2 m, a = 7.797(2) Å, c = 3.716(2) Å), ZrPt2-xSb (MnCu2Al-type, F m over(3, ̄) m, a = 6.3205(7) Å), Zr9Pt9Sb2(Zr9Pt11-type, I4/m, a = 10.4118(8) Å, c = 7.0250(8) Å), Zr5PtSb2(tetragonal, a = 11.0721(8) Å, c = 5.5369(6) Å), and ∼Zr2Pt2Sb (unknown structure). The existence of two previously known compounds, Zr5PtSb3(Hf5CuSn3-type, P63/mcm, a = 8.634(2) Å, c = 5.805(2) Å) and Zr3Pt3Sb4(Y3Au3Sb4-type, I over(4, ̄) 3 d, a = 9.4205(8) Å), was confirmed. The homogeneity ranges were determined to be x = 0.4-0.6 for ZrPt2-xSb and x = 0.57-1.0 for Zr5PtxSb3. © 2007 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Crystal structure
  • Intermetallics
  • Phase diagrams

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