Materials Data on Ba4Na(BO3)3 by Materials Project
NaBa4(BO3)3 crystallizes in the cubic Ia-3d space group. The structure is three-dimensional. Na1+ is bonded in an octahedral geometry to six equivalent O2- atoms. All Na–O bond lengths are 2.38 Å. There are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.70–2.95 Å. In the second Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. All Ba–O bond lengths are 2.78 Å. B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.38 Å) and two longer (1.41 Å) B–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, four Ba2+, and one B3+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Ba2+ and one B3+ atom.