Materials Data on Na3In2(AsO4)3 by Materials Project
Na3In2(AsO4)3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are three inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.39–2.62 Å. In the second Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.43–2.47 Å. In the third Na1+ site, Na1+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.53–3.11 Å. In3+ is bonded to six O2- atoms to form InO6 octahedra that share corners with six AsO4 tetrahedra and an edgeedge with one InO6 octahedra. There are a spread of In–O bond distances ranging from 2.13–2.29 Å. There are two inequivalent As5+ sites. In the first As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with four equivalent InO6 octahedra. The corner-sharing octahedra tilt angles range from 43–59°. There are a spread of As–O bond distances ranging from 1.68–1.75 Å. In the second As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with four equivalent InO6 octahedra. The corner-sharing octahedra tilt angles range from 54–55°. There is two shorter (1.72 Å) and two longer (1.73 Å) As–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Na1+, one In3+, and one As5+ atom to form a mixture of distorted corner and edge-sharing ONa2InAs trigonal pyramids. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one In3+, and one As5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two Na1+, one In3+, and one As5+ atom. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Na1+ and one As5+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent In3+ and one As5+ atom. In the sixth O2- site, O2- is bonded in a trigonal planar geometry to one Na1+, one In3+, and one As5+ atom.