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High-temperature stability of the phase composition of langasite family crystals

  • Proceedings of the International Symposium “Physics of Crystals 2013”
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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

Thermal stability of the phase composition of langasite family crystals is studied by means of high-temperature X-ray diffractometry upon heating in vacuo and in air. Upon heating above 1000°C in vacuo, the partial decomposition of the initial phase is observed in La3Ga5SiO14, La3Ta0.5Ga5.5O14, and Ca3TaGa3Si2O14 crystals; this is accompanied by the emergence of gallium-depleted oxides of the main elements, due to the formation of volatile gallium protoxide and the loss of gallium in the surface layer of the crystals. Langasite family crystals are found to be stable when annealed in air up to a temperature of 1200°C.

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Authors and Affiliations

  1. National University of Science and Technology (MISiS), Moscow, 119049, Russia

    O. M. Kugaenko, S. S. Bazalevskaya & T. B. Sagalova

  2. Institute of Economics and Power Engineering, Moscow, 111250, Russia

    V. S. Petrakov

  3. OAO Fomos-Materials, Moscow, 107023, Russia

    S. S. Bazalevskaya, O. A. Buzanov & S. A. Saharov

Authors
  1. O. M. Kugaenko
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  2. S. S. Bazalevskaya
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  3. T. B. Sagalova
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  4. V. S. Petrakov
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  5. O. A. Buzanov
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  6. S. A. Saharov
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Corresponding author

Correspondence to O. M. Kugaenko.

Additional information

Original Russian Text © O.M. Kugaenko, S.S. Bazalevskaya, T.B. Sagalova, V.S. Petrakov, O.A. Buzanov, S.A. Saharov, 2014, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2014, Vol. 78, No. 10, pp. 1322–1329.

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Kugaenko, O.M., Bazalevskaya, S.S., Sagalova, T.B. et al. High-temperature stability of the phase composition of langasite family crystals. Bull. Russ. Acad. Sci. Phys. 78, 1067–1074 (2014). https://doi.org/10.3103/S106287381410013X

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  • DOI: https://doi.org/10.3103/S106287381410013X

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