Materials Data on BaNaLi3(BO2)6 by Materials Project
Li3NaBaB6O12 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are three shorter (2.34 Å) and three longer (2.45 Å) Na–O bond lengths. Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share a cornercorner with one BO4 tetrahedra, corners with two equivalent LiO4 tetrahedra, and an edgeedge with one BO4 tetrahedra. There are a spread of Li–O bond distances ranging from 1.92–2.10 Å. Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.80–3.21 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share a cornercorner with one LiO4 tetrahedra, corners with two equivalent BO4 tetrahedra, and an edgeedge with one LiO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.46–1.51 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.35 Å) and two longer (1.40 Å) B–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Na1+, one Ba2+, and two B3+ atoms. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Na1+, one Li1+, and two B3+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and two equivalent B3+ atoms. In the fourth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Li1+, one Ba2+, and one B3+ atom.