Materials Data on MnCO3 by Materials Project

MnCO3 is Calcite-like structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Mn2+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 63°. There are a spread of Mn–O bond distances ranging from 2.19–2.26 Å. C4+ is bonded in a trigonal planar geometry to three O2- atoms. All C–O bond lengths are 1.30 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Mn2+ and one C4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Mn2+ and one C4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Mn2+ and one C4+ atom.