Materials Data on Sr3MgRhO6 by Materials Project

Sr3MgRhO6 crystallizes in the trigonal R-3c space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.75 Å. Mg2+ is bonded to six equivalent O2- atoms to form distorted MgO6 pentagonal pyramids that share faces with two equivalent RhO6 octahedra. All Mg–O bond lengths are 2.19 Å. Rh4+ is bonded to six equivalent O2- atoms to form RhO6 octahedra that share faces with two equivalent MgO6 pentagonal pyramids. All Rh–O bond lengths are 2.04 Å. O2- is bonded to four equivalent Sr2+, one Mg2+, and one Rh4+ atom to form a mixture of distorted edge, face, and corner-sharing OSr4MgRh octahedra. The corner-sharing octahedra tilt angles range from 0–65°.