| Инд. авторы: | Rashchenko S.V., Bekker T.B., Bakakin V.V., Seryotkin Y.V., Kokh A.E., Gille P., Popov A.I., Fedorov P.P. |
| Заглавие: | A new mechanism of anionic substitution in fluoride borates |
| Библ. ссылка: | Rashchenko S.V., Bekker T.B., Bakakin V.V., Seryotkin Y.V., Kokh A.E., Gille P., Popov A.I., Fedorov P.P. A new mechanism of anionic substitution in fluoride borates // Journal of Applied Crystallography. - 2013. - Vol.46. - Iss. 4. - P.1081-1084. - ISSN 0021-8898. - EISSN 1600-5767. |
| Внешние системы: | DOI: 10.1107/S0021889813015756; SCOPUS: 2-s2.0-84880525678; WoS: 000322032300035; |
| Реферат: | eng: A comprehensive study of the BaF2-Ba3(BO 3)2 phase diagram has revealed a significant difference between the two intermediate phases Ba5(BO3)3F and Ba 7(BO3)4-y F2+3y. The latter exhibited (BO 3)3- ↔ 3F- anionic substitution which, unusually, strongly influences the solidus temperature. A comparison of the Ba5(BO3)3F and Ba7(BO3)4-y F2+3y crystal structures, along with consideration of other compounds demonstrating (BO3)3- ↔ 3F- isomorphism, allows for the disclosure of the mechanism of (BO3)3- ↔ 3F - heterovalent anionic substitution in fluoride borates via [(BO 3)F]4- tetrahedral groups being replaced by four fluoride anions. No exception to this mechanism has been discovered among all known phases with (BO3)3- ↔ 3F- substitution. © 2013 International Union of Crystallography Printed in Singapore - all rights reserved.
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| Ключевые слова: | Substitution reactions; Set theory; Fluorine compounds; Fluorine; Tetrahedral groups; Solidus temperature; Significant differences; Barium compounds; fluorine-fluorine interaction; fluoride borates; Anionic substitution; anionic isomorphism; fluorine-fluorine interaction; fluoride borates; anionic isomorphism; Intermediate phasis; |
| Издано: | 2013 |
| Физ. характеристика: | с.1081-1084 |