Flux synthesis and characterization of two barium hydroxyborosilicates with triple and single tetrahedral layers: Ba2[Si3B3O12(OH)] and Ba[Si2BO6(OH)]

Ling Wei Chang, Hsin Kuan Liu, Kwang Hwa Lii

研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)

摘要

Two new barium hydroxyborosilicates, Ba2[Si3B3O12(OH)] (1) and Ba[Si2BO6(OH)] (2), have been synthesized by a flux method at 480 ​°C and characterized by single-crystal X-ray diffraction and infrared spectroscopy. Both compounds have 2D layer structures. Compound 1 contains planar slabs of borosilicate formed of tetrahedral building units which can be described as condensation of three 3-connected 2D single layers with a 63 network topology. The Ba2+ cations are located in both the interlayer and intralayer regions. The structure is unusual with respect to the triple tetrahedral layers. Compound 2 consists of very contorted (3,4)-connected single layers with the rare (42.62)(4.62)2 topology. The single layer is composed of both tertiary and quaternary tetrahedra. The synthesis method is new. A mixture of Ba(OH)2·8H2O, H3BO3 and SiO2 was sealed in a gold ampoule, heated at high temperature in a pressure vessel, and the flux is a small amount of concentrated aqueous hydroxide solution. Crystal data for compound 1: monoclinic, P21/n, a ​= ​4.7112(2) Å, b ​= ​29.9482(14) Å, c ​= ​7.3773(4) Å, β ​= ​92.593(2)°, V ​= ​1039.81(9) Å3, Z ​= ​4, and R1 ​= ​0.0246; compound 2: monoclinic, P21/c, a ​= ​7.4206(2) Å, b ​= ​8.9405(2) Å, c ​= ​8.5677(2) Å, β ​= ​90.208(1)°, V ​= ​568.41(2) Å3, Z ​= ​4, and R1 ​= ​0.0467.

原文???core.languages.en_GB???
文章編號121331
期刊Journal of Solid State Chemistry
287
DOIs
出版狀態已出版 - 7月 2020

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