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Enthalpies of Formation of Chromium Fluorides I. Lower Fluorides CrF, CrF2, and CrF3

Authors
  • Nikitin, M. I.1
  • Malkerova, I. P.1
  • Kayumova, D. B.1
  • Alikhanyan, A. S.1
  • 1 Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, 119991, Russia , Moscow (Russia)
Type
Published Article
Journal
Russian Journal of Inorganic Chemistry
Publisher
Pleiades Publishing
Publication Date
Jul 12, 2021
Volume
66
Issue
7
Pages
1011–1016
Identifiers
DOI: 10.1134/S0036023621070093
Source
Springer Nature
Keywords
Disciplines
  • Phyical Methods of Investigation
License
Yellow

Abstract

AbstractDetailed analysis is carried out for the set of experimental data, including those given in most recent publications, on the gas-phase and heterogeneous equilibria of reactions involving lower chromium fluorides. The causes for discrepancies between the same thermodynamic characteristics of compounds obtained in various studies are considered. The results of the analysis are presented as corrected enthalpies of formation of crystalline and gaseous compounds: ΔfH°(CrF, g, 0) = –42.5 ± 15.1 kJ/mol, ΔfH°(CrF2, cr, 298.15 K) = –780.7 ± 2.5 kJ/mol, ΔfH°(CrF2, g, 0) = –454.7 ± 4.6 kJ/mol, ΔfH°(CrF3, cr, 298.15 K) = –1146.7 ± 4.2 kJ/mol, and ΔfH°(CrF3, g, 0) = –799.9 ± 12.1 kJ/mol. The possibility of formation of crystalline Cr2F5 upon reduction of CrF3(cr) was confirmed.

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