GROWTH OF KR3F10 (R = Tb–Er) COMPOUNDS BY THE VERTICAL DIRECTIONAL CRYSTALLIZATION METHOD. III: MELTING CHARACTER AND NONSTOICHIOMETRY OF CUBIC KHo3F10AND KEr3F10 SINGLE CRYSTALS

D. N. Karimov; Каримов Д. Н.; I. I. Buchinskaya; Бучинская И. И.; V. V. Grebenev; Гребенев В. В.

doi:10.31857/S0023476123010125

GROWTH OF KR3F10 (R = Tb–Er) COMPOUNDS BY THE VERTICAL DIRECTIONAL CRYSTALLIZATION METHOD. III: MELTING CHARACTER AND NONSTOICHIOMETRY OF CUBIC KHo3F10AND KEr3F10 SINGLE CRYSTALS

Authors: Karimov D.N.¹, Buchinskaya I.I.¹, Grebenev V.V.¹
Affiliations:
1. Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences, Moscow, 119333 Russia
Issue: Vol 68, No 1 (2023)
Pages: 131-137
Section: CRYSTAL GROWTH
URL: https://kazanmedjournal.ru/0023-4761/article/view/673572
DOI: https://doi.org/10.31857/S0023476123010125
EDN: https://elibrary.ru/DOXRLQ
ID: 673572

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Abstract

KR₃F₁₀ (R = Ho, Er; sp. gr. ) crystals have been grown by the vertical directional crystallization. The incongruent melting of these compounds is experimentally established, and the temperatures of the corresponding thermal effects are determined. Narrow regions of homogeneity are found for the studied crystals; these regions are also characteristic of the entire series of KR3F10 crystals under study. The cubic lattice parameter monotonically decreases along the crystal length and varies in the range of 11.5782(2)–11.5654(5) Å for KHo₃F₁₀ and 11.5225(1)–11.5102(4) Å for KEr₃F₁₀. The conditions for growing KR₃F₁₀crystals of optical quality from melt are optimized.

Keywords

GROWTH OF KR3F10, VERTICAL DIRECTIONAL CRYSTALLIZATION METHOD

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