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Mass spectrometric investigation of the equilibrium gas-phase composition over InI3 at elevated temperatures

✍ Scribed by L. Bencze; J. Marsel; A. Popovič; A. Lesar

Publisher: John Wiley and Sons
Year: 1993
Tongue: English
Weight: 615 KB
Volume: 28
Category: Article
ISSN: 1076-5174
DOI: 10.1002/oms.1210281233

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✦ Synopsis

Abstract

Mass spectra of the saturated vapour and partial pressures of different species over solid InI~3~ were measured between 350 and 450 K with a mass spectrometric Knudsen effusion technique. By measuring appearance energies (AE) for different ions in the mass spectra, it was proved that InI~3~ evaporates congruently from the solid phase as InI~3(g)~ and In~2~I~6(g)~. Values of AE for In~2~I~n~^+^ ions (n = 0–5) increase as n decreases, showing an interesting periodicity with InI bond strengths. For these measurements an improved deconvolution of the ionization efficiency curves by fast Fourier transformation, using a combined Maxwellian and Gaussian electron energy distribution, was performed. By measuring ion abundances as a function of temperature, the Clausius–Clapeyron plots for all ions appearing in the mass spectra were drawn.

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