SPECTROPHOTOMETRIC IN SITU STUDY OF THE COMPOSITION OF SATURATED AND UNSATURATED VAPORS OF IRON (III) CHLORIDE IN THE TEMPERATURE RANGE 150—800 °C

  • Sergei S. Berezin
  • Alexander Yu. Zavrazhnov
  • Vladimir P. Zlomanov
  • Magomed Baba ogly Babanly
Keywords: iron chloride, pyrite, chemical vapor transport, spectrophotometry.

Abstract

We report initial results from our spectrophotometric study of the equilibrium «solid —
vapor» for iron chloride (III) in a wide range of temperatures (150—800 °C). The purpose of the
work was to determine (at least qualitatively) the composition of unsaturated vapor of iron chloride
(III). The experiment consisted in scanning absorption spectra of the vapor (wavelength interval
200—800 nm) in two temperature regimes: incremental increasing and decreasing. Obtained dependences
of the coefficient of absorption k on wavelength l at different temperatures showed that the
character of equilibrium changes at the temperature 231 °C: the saturated vapor turns to unsaturated.
The determination of this temperature let us measure concentration and pressure of Fe2Cl6. Further
studies of unsaturated vapor pointed that at high temperatures it experiences significant changes and,
probably, a new form FeCl2 appears. As metal halides are often used as transport agents for growing
sulfides, current results together with some future investigations in this field may find their application,
for example, as a base for pyrite production for the needs of technology and energetics.

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Author Biographies

Sergei S. Berezin

post graduate student of General
and Inorganic Chemistry Department, Voronezh State University;
e-mail: bss-15.11.88@mail.ru

Alexander Yu. Zavrazhnov

Dr. Sci. (Chem.), Full
Professor of General and Inorganic Chemistry Department,
Voronezh State University; e-mail: alzavr08@rambler.ru

Vladimir P. Zlomanov

Dr. Sci. (Chem.), Full Professor
of General Chemistry Department, Moscow State University;
e-mail: zlomanov@inogr.chem.msu.ru

Magomed Baba ogly Babanly

Dr. Sci. (Chem.), Full
Professor of General and Inorganic Chemistry Department,
Baku State University; ph.: (+994) 124381528, e-mail:
babanly_mb@rambler.ru

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Published
2014-12-25
How to Cite
Berezin, S. S., Zavrazhnov, A. Y., Zlomanov, V. P., & Babanly, M. B. ogly. (2014). SPECTROPHOTOMETRIC IN SITU STUDY OF THE COMPOSITION OF SATURATED AND UNSATURATED VAPORS OF IRON (III) CHLORIDE IN THE TEMPERATURE RANGE 150—800 °C. Kondensirovannye Sredy I Mezhfaznye Granitsy = Condensed Matter and Interphases, 16(4), 418-424. Retrieved from https://journals.vsu.ru/kcmf/article/view/855
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