Enthalpies of formation of Ni-Sn compounds

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

doi:10.1016/j.tca.2006.03.022

Enthalpies of formation of Ni-Sn compounds

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

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28 Scopus citations

Abstract

Enthalpies of formation (Δ_fH) of nickel-tin compounds have been measured by direct reaction calorimetry: Δ_f H^Ni3Sn2-LT = - 29.0 ± 0.9 kJ mol^-1 (approximate value); Δ_fH ^Ni3Sn2-HT = -35.0 ± 0.2kJ mol^-1; Δ_f H^Ni3Sn2-HT = -34.3 ± 1.7 kJ mol^-1; Δ_f H^Ni3Sn-2HT = 21.0± 2.4 kJ mol^-1; Δ_fH^Ni3Sn-LT = 24.4 ± 1.2 kJ mol^-1 and Δ_fH^Ni3Sn4 = 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 language	English (US)
Pages (from-to)	106-108
Number of pages	3
Journal	Thermochimica Acta
Volume	447
Issue number	1
DOIs	https://doi.org/10.1016/j.tca.2006.03.022
State	Published - Aug 1 2006
Externally published	Yes

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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10.1016/j.tca.2006.03.022

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title = "Enthalpies of formation of Ni-Sn compounds",

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.",

keywords = "Direct reaction calorimetry, Enthalpies of formation, Nickel-tin compounds",

author = "Vassilev, {G. P.} and Lilova, {K. I.} and Gachon, {J. C.}",

year = "2006",

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doi = "10.1016/j.tca.2006.03.022",

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T1 - Enthalpies of formation of Ni-Sn compounds

AU - Vassilev, G. P.

AU - Lilova, K. I.

AU - Gachon, J. C.

PY - 2006/8/1

Y1 - 2006/8/1

N2 - 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.

AB - 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.

KW - Direct reaction calorimetry

KW - Enthalpies of formation

KW - Nickel-tin compounds

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Enthalpies of formation of Ni-Sn compounds

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