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This article is cited in 5 scientific papers (total in 5 papers)
Phase transitions
X-ray analysis of the actual structure of yttrium orthoborate YBO$_{3}$
I. M. Shmyt'ko, G. R. Ganeeva Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region
Abstract:
Detailed X-ray analysis of variations in the structure of yttrium orthoborate in the process of successive high-temperature isothermal anneals of an originally amorphous precursor state is performed. It is established that the diffraction reflex intensity distribution of YBO$_{3}$ measured at room temperature, obtained in the initial stages of crystallization, corresponds to the known low-temperature vaterite phase with the space group (sp. gr.) $P$6$_{3}/m$ and, after a series of high-temperature anneals, it transforms into a distribution known for the vaterite modification with the sp. gr. $P$6$_{3}/mmc$ and the same lattice parameters. This result is explained on the basis of the sphericity of X-ray waves and is connected with the transformation of the crystallites from a spherical shape upon low-temperature anneals to a dumbbell shape upon high-temperature anneals. As a result of in situ experiments conducted at 1250$^\circ$C, it was established that the initial low-temperature hexagonal vaterite cell transforms above 1000$^\circ$C into a monoclinic cell.
Received: 18.05.2016
Citation:
I. M. Shmyt'ko, G. R. Ganeeva, “X-ray analysis of the actual structure of yttrium orthoborate YBO$_{3}$”, Fizika Tverdogo Tela, 58:12 (2016), 2439–2445; Phys. Solid State, 58:12 (2016), 2529–2535
Linking options:
https://www.mathnet.ru/eng/ftt9756 https://www.mathnet.ru/eng/ftt/v58/i12/p2439
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