Materials Data on NaB(S2O7)2 by Materials Project
NaB(S2O7)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Na1+ is bonded to seven O2- atoms to form distorted NaO7 pentagonal bipyramids that share corners with seven SO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.41–2.81 Å. B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share corners with four SO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.47–1.50 Å. There are four inequivalent S6+ sites. In the first S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two equivalent NaO7 pentagonal bipyramids, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. There are a spread of S–O bond distances ranging from 1.43–1.66 Å. In the second S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two equivalent NaO7 pentagonal bipyramids, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. There are a spread of S–O bond distances ranging from 1.42–1.65 Å. In the third S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with two equivalent NaO7 pentagonal bipyramids, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. There are a spread of S–O bond distances ranging from 1.43–1.65 Å. In the fourth S6+ site, S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one NaO7 pentagonal bipyramid, a cornercorner with one BO4 tetrahedra, and a cornercorner with one SO4 tetrahedra. There are a spread of S–O bond distances ranging from 1.42–1.67 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Na1+ and one S6+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the third O2- site, O2- is bonded in a distorted linear geometry to one Na1+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+ and one S6+ atom. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to two S6+ atoms. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to one Na1+ and one S6+ atom. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the ninth O2- site, O2- is bonded in a bent 120 degrees geometry to two S6+ atoms. In the tenth O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+ and one S6+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+ and one S6+ atom. In the thirteenth O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one S6+ atom. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+ and one S6+ atom.