Crystal structures and thermal expansion of Sr1–xBaxBi2B2O7 solid solutions


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A series of Sr1–xBaxBi2B2O7 solid solutions (x = 0–1) have been synthesized by crystallization from glass ceramics. The crystal structures of solid solutions at x = 0.65 and x = 1 were solved by direct methods of X-ray diffraction from single crystal data and refined in a reduced cell (\({a_{Ba}}{\kern 1pt} = {a_{Sr}}/\sqrt 3 \)) relative to SrBi2B2O7 in the same space group P63. Using the Rietveld method, the phase transition range at x = 0.65–0.70 with a reduction of the unit cell has been revealed. As was shown by method of high-temperature powder X-ray diffraction, the solid solutions demonstrated an anisotropic thermal expansion (TE) upon heating in air.

作者简介

R. Bubnova

Grebenshchikov Institute of Silicate Chemistry; St. Petersburg State University

Email: shablinskii.andrey@mail.ru
俄罗斯联邦, nab. Makarova 2, St. Petersburg, 199034; Universtitetskaya nab. 7/9, St. Petersburg, 199034

A. Shablinskii

Grebenshchikov Institute of Silicate Chemistry; St. Petersburg State University

编辑信件的主要联系方式.
Email: shablinskii.andrey@mail.ru
俄罗斯联邦, nab. Makarova 2, St. Petersburg, 199034; Universtitetskaya nab. 7/9, St. Petersburg, 199034

S. Volkov

Grebenshchikov Institute of Silicate Chemistry

Email: shablinskii.andrey@mail.ru
俄罗斯联邦, nab. Makarova 2, St. Petersburg, 199034

S. Filatov

St. Petersburg State University

Email: shablinskii.andrey@mail.ru
俄罗斯联邦, Universtitetskaya nab. 7/9, St. Petersburg, 199034

M. Krzhizhanovskaya

St. Petersburg State University

Email: shablinskii.andrey@mail.ru
俄罗斯联邦, Universtitetskaya nab. 7/9, St. Petersburg, 199034

V. Ugolkov

Grebenshchikov Institute of Silicate Chemistry

Email: shablinskii.andrey@mail.ru
俄罗斯联邦, nab. Makarova 2, St. Petersburg, 199034

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