SOLUBILITY OF PHOSPHORUS IN TIN MONOARSENIDE

  • Galina V. Semenova Dr. Sci. (Chem.), Full Professor, Department of General and Inorganic Chemistry, Voronezh State University, Voronezh, Russia; tel.: +7(473) 2208610, e-mail: semen157@ chem.vsu.ru
  • Tatiana P. Sushkova Cand. Sci. (Chem.), Assistant Professor, Department of General and Inorganic Chemistry, Voronezh State University, Voronezh, Russia; tel.: +7(473) 2208610, e-mail: sushtp@yandex.ru
  • Elena N. Zinchenko Engineer the Collective Use Center of Voronezh State University, Voronezh, Russia; tel.: +7(919) 1875774, e-mail: zinchenko@vsu.ru
  • Sergei V. Yakunin Master Student, Department of General and Inorganic Chemistry, Voronezh State University, Voronezh, Russia; +7 (915) 5456094, e-mail: sergey.yakunin.96@mail.ru
Keywords: phase equilibria, solid solutions, Sn – As – P system.

Abstract

The Sn – As – P system is characterized by the presence of unlimited solid solutions (Sn4As3) x (Sn4P3) 1-х (α-phase) and solid solutions based on tin monoarsenide (β-solid solutions) and SnP3 phosphide (γ-solid solutions). The solubility of phosphorus in SnAs depends not only on temperature, but also on the direction of the polythermal cross section, i.e. from that in the form of an individual simple substance or in the form of any of the tin phosphides, the doping component is introduced. In the present work, the configuration of the region of existence of solid solutions of phosphorus in tin monoarsenide was investigated. Alloys of SnAs – Sn4P3:SnAs – Sn0.43P0.57; SnAs - SnP3 and SnAs - P polythermal sections, annealed at 753 K, were studied by X-ray phase analysis, the concentration range of the existence of a homogeneous solid solution was established, the parameters of the crystal structure were determined. The construction of quasi-chemical schemes for the doping of tin monoarsenide showed that with the introduction of SnP3, the greatest deviation from stoichiometry towards the lack of tin is observed.  The highest solubility of phosphorus, reaching 30 mol % corresponds to this cut. Thus, the region of existence of solid solutions based on tin monoarsenide has an asymmetric shape shifted toward an excess of volatile components, and the maximum solubility of phosphorus corresponds to the direction of the polythermal section SnAs – SnP3. Taking into account the phase equilibrium scheme of the Sn – As – P ternary system and the obtained data on the configuration of the region of existence of homogeneous solid solutions of phosphorus in the tin monoarsenide, a phase subsolidus demarcation scheme of the phase diagram of this system was carried out.

ACKNOWLEDGMENTS

The research results were obtained using the equipment of the Center for Collective Use of Equipment Voronezh State University.

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References

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Published
2018-12-17
How to Cite
Semenova, G. V., Sushkova, T. P., Zinchenko, E. N., & Yakunin, S. V. (2018). SOLUBILITY OF PHOSPHORUS IN TIN MONOARSENIDE. Kondensirovannye Sredy I Mezhfaznye Granitsy = Condensed Matter and Interphases, 20(4), 644-649. https://doi.org/10.17308/kcmf.2018.20/639
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