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Phase equilibria in the Sn–As–Ge and Sn–As–P systems

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Abstract

T–x diagrams of polythermal GeAs–SnAs, GeAs–Sn4As3 sections of the Sn–As–Ge system and Sn4P3–Sn4As3 section of the Sn–As–P system were constructed using the results of X-ray powder diffraction and differential thermal analyses. It was found that the section GeAs–Sn4As3 is not quasi-binary due to realization of four-phase peritectic transformation L + SnAs ↔ GeAs + Sn4As3 at the temperature of 834 K. The quasi-binary section GeAs–SnAs represents a phase diagram of the eutectic type with the following coordinates of eutectic reaction: temperature of the eutectic point is 840 K, and composition is 20 mol% GeAs. In the Sn–As–P system, the existence of the solid-solution range indicated as (Sn4As3) x (Sn4P3)1−x  was defined. The polythermal section Sn4P3–Sn4As3 is not quasi-binary due to the fact that in the composition range with a high content of tin arsenide discussed section intersects the peritectic part of the three-phase volume (L + SnAs + α) of the ternary diagram.

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Authors and Affiliations

  1. Department of General and Inorganic Chemistry, Voronezh State University, Universitetskaya pl. 1, 394006, Voronezh, Russia

    E. Yu Kononova, G. V. Semenova & T. P. Sushkova

  2. Department of metallurgical technologies, Saint - Petersburg state Polytechnical University, St. Petersburg, Russia

    S. I. Sinyova

Authors
  1. E. Yu Kononova
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  2. S. I. Sinyova
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  3. G. V. Semenova
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  4. T. P. Sushkova
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Correspondence to E. Yu Kononova.

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Kononova, E.Y., Sinyova, S.I., Semenova, G.V. et al. Phase equilibria in the Sn–As–Ge and Sn–As–P systems. J Therm Anal Calorim 117, 1171–1177 (2014). https://doi.org/10.1007/s10973-014-3883-3

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  • DOI: https://doi.org/10.1007/s10973-014-3883-3

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