Materials Data on NaLa(SeO3)2 by Materials Project
NaLa(SeO3)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.34–2.56 Å. La3+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of La–O bond distances ranging from 2.49–2.92 Å. There are two inequivalent Se4+ sites. In the first Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is two shorter (1.72 Å) and one longer (1.73 Å) Se–O bond length. In the second Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is two shorter (1.72 Å) and one longer (1.75 Å) Se–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to one Na1+, two equivalent La3+, and one Se4+ atom to form distorted corner-sharing ONaLa2Se tetrahedra. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, two equivalent La3+, and one Se4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one La3+, and one Se4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent La3+ and one Se4+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, two equivalent La3+, and one Se4+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one La3+, and one Se4+ atom.