Materials Data on CsNaMg6 by Materials Project

CsNaMg6 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Cs is bonded to two equivalent Na and ten Mg atoms to form CsNa2Mg10 cuboctahedra that share corners with four equivalent NaCs2Mg10 cuboctahedra, corners with six equivalent CsNa2Mg10 cuboctahedra, edges with two equivalent NaCs2Mg10 cuboctahedra, faces with two equivalent CsNa2Mg10 cuboctahedra, and faces with two equivalent NaCs2Mg10 cuboctahedra. Both Cs–Na bond lengths are 3.40 Å. There are a spread of Cs–Mg bond distances ranging from 3.49–3.60 Å. Na is bonded to two equivalent Cs and ten Mg atoms to form NaCs2Mg10 cuboctahedra that share corners with four equivalent CsNa2Mg10 cuboctahedra, corners with six equivalent NaCs2Mg10 cuboctahedra, edges with two equivalent CsNa2Mg10 cuboctahedra, faces with two equivalent CsNa2Mg10 cuboctahedra, and faces with two equivalent NaCs2Mg10 cuboctahedra. There are a spread of Na–Mg bond distances ranging from 3.47–3.55 Å. There are four inequivalent Mg sites. In the first Mg site, Mg is bonded in a 12-coordinate geometry to two equivalent Cs, two equivalent Na, and eight Mg atoms. There are a spread of Mg–Mg bond distances ranging from 3.36–3.52 Å. In the second Mg site, Mg is bonded in a 11-coordinate geometry to two equivalent Cs, two equivalent Na, and three Mg atoms. The Mg–Mg bond length is 3.29 Å. In the third Mg site, Mg is bonded in a 2-coordinate geometry to two equivalent Na and six Mg atoms. Both Mg–Mg bond lengths are 3.40 Å. In the fourth Mg site, Mg is bonded in a 2-coordinate geometry to two equivalent Cs and eight Mg atoms.