Enthalpies of formation of Ni-Sn compounds

G. P. Vassilev, K. I. Lilova, J. C. Gachon

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Enthalpies of formation (ΔfH) of nickel-tin compounds have been measured by direct reaction calorimetry: Δf HNi3Sn2-LT = - 29.0 ± 0.9 kJ mol-1 (approximate value); ΔfH Ni3Sn2-HT = -35.0 ± 0.2kJ mol-1; Δf HNi3Sn2-HT = -34.3 ± 1.7 kJ mol-1; Δf HNi3Sn-2HT = 21.0± 2.4 kJ mol-1; ΔfHNi3Sn-LT = 24.4 ± 1.2 kJ mol-1 and ΔfHNi3Sn4 = 29.8 ± 1 kJ mol-1. Standard states are solid Ni and liquid Sn at the respective working temperatures: 728, 1288, 1389, 1332, 943 and 846 K. The enthalpy of formation of the Ni3Sn high-temperature form is measured for the first time, while that of Ni3Sn2_LT must be considered as approximate because the corresponding calorimetric reaction was incomplete. The chemical and phase compositions of the specimens have been verified by electron probe microanalyses and by high- and room-temperature X-ray diffraction analyses. Unidentified thermal effects have been observed in the Ni3Sn2 phases region.

Original languageEnglish (US)
Pages (from-to)106-108
Number of pages3
JournalThermochimica Acta
Volume447
Issue number1
DOIs
StatePublished - Aug 1 2006
Externally publishedYes

Keywords

  • Direct reaction calorimetry
  • Enthalpies of formation
  • Nickel-tin compounds

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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