Materials Data on Na2BiAsCO7 by Materials Project
Na2CBiAsO7 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.33–2.74 Å. C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.26–1.33 Å. Bi3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.30–2.63 Å. As5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of As–O bond distances ranging from 1.71–1.76 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Na1+ and one C4+ atom. In the second O2- site, O2- is bonded to two equivalent Na1+, one C4+, and one Bi3+ atom to form distorted corner-sharing ONa2BiC trigonal pyramids. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Na1+, one C4+, and one Bi3+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Bi3+, and one As5+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Na1+, one Bi3+, and one As5+ atom. In the sixth O2- site, O2- is bonded to two equivalent Na1+, one Bi3+, and one As5+ atom to form distorted corner-sharing ONa2BiAs tetrahedra.