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Growth of R 1 − y Sr y F3 − y crystals with rare earth elements of the cerium subgroup (R = La, Ce, Pr, or Nd; 0 ≤ y ≤ 0.16) and the dependence of their density and optical characteristics on composition

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Abstract

Crystals of the R 1 − y Sr y F3 − y phases (R = La, Ce, Pr, or Nd; 0 ≤ y ≤ 0.16) with tysonite (LaF3) structure are grown by the Bridgman method. A linear dependence of the crystal density on the SrF2 concentration has been revealed for each series of solid solutions. A scheme of heterovalent isomorphous substitution in the tysonite structure, R 3+ + F1− → M 2+ + V F, with compensation of the difference in the cation charges due to the formation of anion vacancies, is confirmed experimentally. The optical transmission spectra are measured in the wavelength range λ = 2.18–22.22 μm. It is shown that the 50%-transmission edge in the IR range is 10.5 μm for all crystals. The refractive index and the polarizability of crystals decrease with decreasing SrF2 content according to a linear law. The melting curves of the R 1 − y Sr y F3 − y phases studied have a maximum; therefore, these phases can be recommended for use as crystals with a high homogeneity and different optical properties in comparison with the corresponding RF3 crystals.

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Authors and Affiliations

  1. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskiĭ pr. 59, Moscow, 119333, Russia

    E. A. Krivandina, Z. I. Zhmurova & B. P. Sobolev

  2. Moscow State University, Vorob’evy gory, Moscow, 119899, Russia

    T. M. Glushkova, D. F. Kiselev, M. M. Firsova & A. P. Shtyrkova

Authors
  1. E. A. Krivandina
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  2. Z. I. Zhmurova
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  3. B. P. Sobolev
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  4. T. M. Glushkova
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  5. D. F. Kiselev
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  6. M. M. Firsova
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  7. A. P. Shtyrkova
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Dedicated to the 60th Birthday of M.V. Kovalchuk

Original Russian Text © E.A. Krivandina, Z.I. Zhmurova, B.P. Sobolev, T.M. Glushkova, D.F. Kiselev, M.M. Firsova, A.P. Shtyrkova, 2006, published in Kristallografiya, 2006, Vol. 51, No. 5, pp. 954–960.

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Krivandina, E.A., Zhmurova, Z.I., Sobolev, B.P. et al. Growth of R 1 − y Sr y F3 − y crystals with rare earth elements of the cerium subgroup (R = La, Ce, Pr, or Nd; 0 ≤ y ≤ 0.16) and the dependence of their density and optical characteristics on composition. Crystallogr. Rep. 51, 895–901 (2006). https://doi.org/10.1134/S106377450605021X

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  • DOI: https://doi.org/10.1134/S106377450605021X

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