Na₆B₁₀Se₁₈: a novel selenoborate with a 3D polymeric anion structure

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• 作者：Hammerschmidt ; Adrienne ; Lindemann ; Arno ; Dö ; ch ; Matthias ; Krebs ; Bernt
• 关键词：Selenoborates ; Boron ; Crystal structures
• 刊名：Solid State Sciences
• 出版年：2002
• 出版时间：November - December, 2002
• 年：2002
• 卷：4
• 期：1
• 页码：1449-1455
• 全文大小：390 K

文摘

Systematic studies on selenoborates containing infinite polymeric anions and alkali metal cations led to the new crystalline phase Na₆B₁₀Se₁₈ which consists of two interpenetrating networks and sodium counter-ions. Corner sharing super-adamantanous B₁₀Se₂₀ entities form infinite polymeric anions of formula ([B₁₀Se₁₆Se_4/2]⁶⁻)_∞. The new chalcogenoborate was prepared in a solid state reaction from sodium selenide, amorphous boron and selenium in evacuated carbon coated silica tubes at a temperature of 850°C. Na₆B₁₀Se₁₈ crystallizes in the tetragonal space group I4₁/acd (no. 142) with a=15.128(2) Å, c=27.955(6) Å, and Z=8.