Materials Data on Na3Cu2(MoO4)3 by Materials Project
Na3Cu2(MoO4)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 2.34–2.61 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 2.41–2.68 Å. In the third Na1+ site, Na1+ is bonded in a distorted rectangular see-saw-like geometry to four equivalent O2- atoms. There are two shorter (2.37 Å) and two longer (2.48 Å) Na–O bond lengths. There are two inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with four equivalent CuO6 octahedra. The corner-sharing octahedra tilt angles range from 53–57°. There is two shorter (1.81 Å) and two longer (1.82 Å) Mo–O bond length. In the second Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with four equivalent CuO6 octahedra. The corner-sharing octahedra tilt angles range from 35–63°. There is one shorter (1.79 Å) and three longer (1.81 Å) Mo–O bond length. Cu+1.50+ is bonded to six O2- atoms to form distorted CuO6 octahedra that share corners with six MoO4 tetrahedra and an edgeedge with one CuO6 octahedra. There are a spread of Cu–O bond distances ranging from 2.01–2.60 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Mo6+ and two equivalent Cu+1.50+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Mo6+, and one Cu+1.50+ atom. In the third O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Na1+ and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Mo6+, and one Cu+1.50+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Na1+, one Mo6+, and one Cu+1.50+ atom. In the sixth O2- site, O2- is bonded to two equivalent Na1+, one Mo6+, and one Cu+1.50+ atom to form a mixture of distorted edge and corner-sharing ONa2CuMo tetrahedra.