Materials Data on Li3Mn8O16 by Materials Project
Li3Mn8O16 is beta indium sulfide-derived structured and crystallizes in the tetragonal P-4m2 space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four equivalent O2- atoms to form LiO4 tetrahedra that share corners with twelve MnO6 octahedra. The corner-sharing octahedral tilt angles are 59°. All Li–O bond lengths are 1.98 Å. In the second Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with twelve MnO6 octahedra. The corner-sharing octahedra tilt angles range from 58–61°. There are two shorter (2.01 Å) and two longer (2.02 Å) Li–O bond lengths. There are two inequivalent Mn+3.62+ sites. In the first Mn+3.62+ site, Mn+3.62+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with five LiO4 tetrahedra and edges with six MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.94–2.02 Å. In the second Mn+3.62+ site, Mn+3.62+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with four LiO4 tetrahedra and edges with six MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.96–2.03 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to one Li1+ and three equivalent Mn+3.62+ atoms to form a mixture of distorted edge and corner-sharing OLiMn3 trigonal pyramids. In the second O2- site, O2- is bonded to one Li1+ and three equivalent Mn+3.62+ atoms to form a mixture of distorted edge and corner-sharing OLiMn3 tetrahedra. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Mn+3.62+ atoms. In the fourth O2- site, O2- is bonded to one Li1+ and three Mn+3.62+ atoms to form a mixture of distorted edge and corner-sharing OLiMn3 trigonal pyramids.