Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1016/j.jcrysgro.2022.126917

Ключевые слова: a1. phase equilibria, a2. growth from solutions, b1. borates, b1. gaudefroyites

Аннотация: The work is aimed at studying the crystallization of ReCa3Mn3O3(BO3)4 (Re = Gd, Y) borates with the gaudefroyite structure in different flux systems. Gaudefroyites are promising materials in the field of spin ice and magnetocaloric effect. The study has been performed on systems based on the following solvents: Bi2Mo3O12-Na2B4O7-B2Показать полностьюO3, Bi2O3-Na2B4O7-B2O3, Bi2O3-BaO-Na2B4O7-B2O3, Li2WO4-Li2O-B2O3. The influence of the solvent components on the sequence of high-temperature crystallizing phases has been studied. The feature of Mo- and W-containing fluxes consisting in the formation of stable chemical bonds of the M2+Mo(W)O4 (M = Ca, Mn) molybdate or tungstate types has been revealed which prevents the formation of gaudefroyite type bonds. An approach has been suggested for changing the sequence of the crystallizing phases which consists in the super saturation of molybdate (tungstate) bonds by Na+ or Li+ cations up to the formation of delafossite-type bonds (Li(Na)-Mn-O phase) with higher manganese valence states Mn3+ and Mn4+. The optimization of the growth conditions of ReCa3(MnO)3(BO3)4 (Re = Gd, Y) gaudefroyite crystals has allowed one to obtain single crystal samples with the size up to 0.8 × 0.8 × 5 mm3. The structural characterization and chemical composition of all the obtained phases are also presented. © 2022 Elsevier B.V.

Журнал: Journal of Crystal Growth

Выпуск журнала: Vol. 600

Номера страниц: 126917

ISSN журнала: 00220248

Издатель: Elsevier B.V.

• Moshkina E. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)
• Belskaya N. (Ioffe Institute, Saint Petersburg, 194021, Russian Federation)
• Bashleev Z. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Molokeev M. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation, Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation)
• Soloviev L. (Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660049, Russian Federation)
• Shabanova K. (Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation, Siberian State University of Science and Technologies, Krasnoyarsk, 660037, Russian Federation)

• Scopus
• Ядро РИНЦ (eLIBRARY.RU)