Materials Data on BaMg(CO3)2 by Materials Project

BaMg(CO3)2 crystallizes in the trigonal R-3c space group. The structure is three-dimensional. Ba2+ is bonded to twelve equivalent O2- atoms to form BaO12 cuboctahedra that share edges with six equivalent BaO12 cuboctahedra and edges with six equivalent MgO6 octahedra. There are six shorter (2.85 Å) and six longer (3.11 Å) Ba–O bond lengths. Mg2+ is bonded to six equivalent O2- atoms to form MgO6 octahedra that share edges with six equivalent BaO12 cuboctahedra. All Mg–O bond lengths are 2.09 Å. C4+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All C–O bond lengths are 1.30 Å. O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+, one Mg2+, and one C4+ atom.