材料期刊网

A novel hexaborate, Na(2)ZnB(6)O(11), has been successfully synthesized by solid-state reaction and ab initio crystal-structure analysis has been completed using powder X-ray diffraction data. The compound crystallizes in the monoclinic space group Cc with lattice parameters a = 10.7329(2) angstrom, b=7.4080(3) angstrom. c=11.4822(2) angstrom, and beta= 112.16(2)degrees. The number of chemical formula per unit cell is Z=4 and the calculated density is 2.768(3) g/cm(3). It represents a new structure type in which double-bridge-ring [B(6)O(11)](4-) groups were found as fundamental building units. The infrared spectrum confirms the presence of both [BO(3)](3-) groups and [BO(4)](5-) groups. (C) 2010 International Centre for Diffraction Data. [DOI: 10.1154/1.3309719]