Materials Data on Na2Cd(SO4)2 by Materials Project
Na2Cd(SO4)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Na1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Na–O bond distances ranging from 2.36–3.06 Å. Cd2+ is bonded to six O2- atoms to form distorted CdO6 octahedra that share corners with six equivalent SO4 tetrahedra. There are a spread of Cd–O bond distances ranging from 2.28–2.43 Å. S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with three equivalent CdO6 octahedra. The corner-sharing octahedra tilt angles range from 38–68°. There are a spread of S–O bond distances ranging from 1.49–1.51 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Na1+, one Cd2+, and one S6+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Cd2+, and one S6+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Na1+, one Cd2+, and one S6+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to three equivalent Na1+ and one S6+ atom.