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TEM investigation of phase relations in the CaF2–ErF3 system (65–85 mol %) in the range of tysonite phase formation

  • Proceedings of the XXV Russian Conference on Electron Microscopy (RCEM-2014)
  • Published:
Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

A phase analysis of 11 samples of the CaF2–ErF3 system in the range of 65–85 mol % CaF2 is performed by means of transmission electron microscopy (TEM) and X-ray elemental analysis. The specimens are synthesized at 905 ± 10°C for 230 h and quenched at a rate of ~200 grad s–1. An ordered phase with a fluorite structure and a composition close to Ca0.6Er0.4F2.4, an ordered phase that is a derivative of a tysonite structure with a composition close to Er0.7Ca0.3F2.7, and ErF3 are revealed, along with a phase having a variable composition of 73–78 mol % ErF3. The latter phase has a tysonite matrix and embedded nanometersized lamellar inclusions of a phase that likely inherited the structure of an ordered phase.

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Authors and Affiliations

  1. Institute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    V. I. Nikolaichik

  2. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow, 117333, Russia

    B. P. Sobolev, M. A. Zaporozhets & A. S. Avilov

Authors
  1. V. I. Nikolaichik
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  2. B. P. Sobolev
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  3. M. A. Zaporozhets
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  4. A. S. Avilov
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Corresponding author

Correspondence to V. I. Nikolaichik.

Additional information

Original Russian Text © V.I. Nikolaichik, B.P. Sobolev, M.A. Zaporozhets, A.S. Avilov, 2015, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2015, Vol. 79, No. 11, pp. 1514–1518.

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Nikolaichik, V.I., Sobolev, B.P., Zaporozhets, M.A. et al. TEM investigation of phase relations in the CaF2–ErF3 system (65–85 mol %) in the range of tysonite phase formation. Bull. Russ. Acad. Sci. Phys. 79, 1332–1336 (2015). https://doi.org/10.3103/S1062873815110167

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  • DOI: https://doi.org/10.3103/S1062873815110167

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