Materials Data on LiTm(WO4)2 by Materials Project
LiTm(WO4)2 crystallizes in the monoclinic P2/c space group. The structure is three-dimensional. Li1+ is bonded to six O2- atoms to form distorted LiO6 octahedra that share corners with eight equivalent WO6 octahedra and edges with two equivalent TmO6 octahedra. The corner-sharing octahedra tilt angles range from 42–58°. There are a spread of Li–O bond distances ranging from 2.13–2.47 Å. Tm3+ is bonded to six O2- atoms to form TmO6 octahedra that share corners with eight equivalent WO6 octahedra and edges with two equivalent LiO6 octahedra. The corner-sharing octahedra tilt angles range from 46–60°. There are a spread of Tm–O bond distances ranging from 2.21–2.30 Å. W6+ is bonded to six O2- atoms to form distorted WO6 octahedra that share corners with four equivalent LiO6 octahedra, corners with four equivalent TmO6 octahedra, and edges with two equivalent WO6 octahedra. The corner-sharing octahedra tilt angles range from 42–60°. There are a spread of W–O bond distances ranging from 1.83–2.20 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Tm3+ and two equivalent W6+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Tm3+, and one W6+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+ and two equivalent W6+ atoms. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Tm3+, and one W6+ atom.