Materials Data on NaSiSbCO7 by Materials Project
NaSiCSbO7 crystallizes in the monoclinic P2_1 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 2.18–2.95 Å. Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four equivalent SbO6 octahedra. The corner-sharing octahedra tilt angles range from 38–44°. There are a spread of Si–O bond distances ranging from 1.63–1.66 Å. C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.22–1.36 Å. Sb5+ is bonded to six O2- atoms to form SbO6 octahedra that share corners with four equivalent SiO4 tetrahedra. There are a spread of Sb–O bond distances ranging from 1.95–2.07 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Na1+ and one C4+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one C4+, and one Sb5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one C4+, and one Sb5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Si4+ and one Sb5+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Si4+, and one Sb5+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Si4+, and one Sb5+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Si4+, and one Sb5+ atom.