Title
Thermodynamic Study of the Gaseous Molecules Al2N, AlN, and Al2N2 by Knudsen Cell Mass Spectrometry
Document Type
Article
Publication Date
2000
Abstract
The Knudsen effusion mass spectrometric method has been employed to measure the equilibrium partial pressures of the Al2N molecule over the AlN–Au–graphite system. Theoretical computations were carried out to determine the structure, molecular parameters, and thermodynamic properties of Al2N. The partial pressures have been combined with the calculated thermal functions to determine the atomization enthalpy,ΔaHo0, and enthalpy of formation,ΔfHo298.15, in kJ mol−1, of 783.2±15 and 342.7±15 for Al2N, respectively. Upper values for the dissociation energy of AlN, Do0(AlN,g)⩽368±15 kJ mol−1, and for the atomization enthalpy of Al2N2, ΔaHo0(Al2N2,g)⩽1402 kJ mol−1 have been obtained. These results are discussed and compared with recent theoretical literature values.
DOI
10.1063/1.1326848
Recommended Citation
Meloni, G. and Gingerich, K. A. Thermodynamic study of the gaseous molecules Al2N, AlN, and Al2N2 by Knudsen cell mass spectrometry. The Journal of Chemical Physics, 113, 10978-10982 (2000).
Comments
Copyright 2000 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
The following article appeared in Meloni, G. and Gingerich, K. A. Thermodynamic study of the gaseous molecules Al2N, AlN, and Al2N2 by Knudsen cell mass spectrometry. The Journal of Chemical Physics, 113, 10978-10982 (2000). and may be found at http://dx.doi.org/10.1063/1.1326848.