Potassium pentaborate

作者：Wu Qi^*

来源：Acta Crystallographica Section E-Structure Reports Online, 2011, 67: I67-+.

DOI：10.1107/S1600536811043807

The title compound, K[B5O7(OH)(2)], was obtained from a hydrothermal reaction. The structure is composed of one K+ cation and a polyborate (1)(infinity)[B5O7(OH)(2)](-) anion, which consists of two six-membered rings linked by a common BO4 tetrahedron. The [B5O7(OH)(2)](-) units are linked together through two exocyclic O atoms to neighbouring units, forming a helical chain structure extending parallel to [010]. Adjacent chains are further connected into a three-dimensional structure by K-O bonds and weak O-H center dot center dot center dot O hydrogen-bond interactions.

• 出版日期2011-11