DOE OSTI2020
LiMnP(H6O5)2 crystallizes in the orthorhombic Pmn2_1 space group. The structure is three-dimensional. Li1+ is bonded in a distorted square co-planar geometry to four O2- atoms. There are two shorter (2.05 Å) and two longer (2.35 Å) Li–O bond lengths. Mn2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Mn–O bond distances ranging from 2.17–2.27 Å. P5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. There are seven inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.65 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the third H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.61 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.64 Å) H–O bond length. In the fifth H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.59 Å) H–O bond length. In the sixth H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.56 Å) H–O bond length. In the seventh H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.62 Å) H–O bond length. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to one Mn2+ and two equivalent H1+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mn2+ and two H1+ atoms. In the third O2- site, O2- is bonded to one P5+ and three H1+ atoms to form distorted corner-sharing OPH3 tetrahedra. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to one Li1+, one Mn2+, and two H1+ atoms. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to one Li1+, one Mn2+, and two H1+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one P5+ and two equivalent H1+ atoms. In the seventh O2- site, O2- is bonded to one P5+ and three H1+ atoms to form distorted corner-sharing OPH3 trigonal pyramids.