Materials Data on Li3MgPCO7 by Materials Project
Li3MgCPO7 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Li–O bond distances ranging from 1.97–2.51 Å. In the second Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.06–2.69 Å. Mg2+ is bonded to six O2- atoms to form distorted MgO6 octahedra that share corners with four equivalent PO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.03–2.31 Å. C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.29–1.31 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent MgO6 octahedra. The corner-sharing octahedra tilt angles range from 46–60°. There is three shorter (1.55 Å) and one longer (1.56 Å) P–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to three Li1+, one Mg2+, and one C4+ atom. In the second O2- site, O2- is bonded to three Li1+ and one C4+ atom to form a mixture of edge and corner-sharing OLi3C tetrahedra. In the third O2- site, O2- is bonded in a 5-coordinate geometry to three Li1+, one Mg2+, and one C4+ atom. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to two Li1+, one Mg2+, and one P5+ atom. In the fifth O2- site, O2- is bonded to two equivalent Li1+, one Mg2+, and one P5+ atom to form distorted OLi2MgP tetrahedra that share corners with four equivalent OLi2MgP trigonal pyramids and an edgeedge with one OLi3C tetrahedra. In the sixth O2- site, O2- is bonded to two equivalent Li1+, one Mg2+, and one P5+ atom to form distorted corner-sharing OLi2MgP trigonal pyramids.