Scholarlink

Abstract <p>New mixed ammonium-cesium borate (NH<sub>4</sub>)<sub>0.858</sub>Cs<sub>0.142</sub>[B<sub>5</sub>O<sub>7</sub>(OH)<sub>2</sub>]·0.5H<sub>2</sub>O is prepared by soft hydrothermal synthesis in an evacuated quartz ampule and is structurally characterized (<i>a</i>&#xa0;=&#xa0;7.6647(3), <i>b</i>&#xa0;=&#xa0;9.2272(4), <i>c</i>&#xa0;=&#xa0;12.0245(5)&#xa0;Å, α&#xa0;=&#xa0;99.264(3), β&#xa0;=&#xa0;106.204(4), γ&#xa0;=&#xa0;91.511(3)°; space group <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$P\bar{1}$</EquationSource> </InlineEquation>; <i>Z</i>&#xa0;=&#xa0;4). The compound belongs to a wide family of <i>M</i>[B<sub>5</sub>O<sub>7</sub>(OH)<sub>2</sub>]·0.5H<sub>2</sub>O (<i>M</i>&#xa0;=&#xa0;NH<sub>4</sub>, K, Rb, Cs, Ag) borates. The crystal structure of these compounds is formed by larderellite-like (5B:4<b>ΔT</b>:‹2<b>ΔT</b>›–‹2<b>ΔT</b>›)<sub>∞</sub> boron-oxygen chains combined via large monovalent cations. The structural relation of <i>M</i>[B<sub>5</sub>O<sub>7</sub>(OH)<sub>2</sub>]·0.5H<sub>2</sub>O and <i>M</i>[B<sub>5</sub>O<sub>7</sub>(OH)<sub>2</sub>]·H<sub>2</sub>O families is discussed. The main differences between the structures are determined by different topologies of relative positions of their chains.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synthesis and Crystal Structure of a New Mixed NH4/Cs Borate (NH4)0.858Cs0.142[B5O7(OH)2]·0.5H2O

  • 期刊论文

  • 发表日期：

    2026年4月1日

查看全文
  • Yu. O. Kopylova,
  • S. N. Volkov,
  • S. M. Aksenov,
  • R. S. Bubnova

摘要

Abstract

New mixed ammonium-cesium borate (NH4)0.858Cs0.142[B5O7(OH)2]·0.5H2O is prepared by soft hydrothermal synthesis in an evacuated quartz ampule and is structurally characterized (a = 7.6647(3), b = 9.2272(4), c = 12.0245(5) Å, α = 99.264(3), β = 106.204(4), γ = 91.511(3)°; space group $P\bar{1}$ ; Z = 4). The compound belongs to a wide family of M[B5O7(OH)2]·0.5H2O (M = NH4, K, Rb, Cs, Ag) borates. The crystal structure of these compounds is formed by larderellite-like (5B:4ΔT:‹2ΔT›–‹2ΔT›)∞ boron-oxygen chains combined via large monovalent cations. The structural relation of M[B5O7(OH)2]·0.5H2O and M[B5O7(OH)2]·H2O families is discussed. The main differences between the structures are determined by different topologies of relative positions of their chains.