DOE OSTI2020
Lu2TiO5 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are sixteen inequivalent Lu3+ sites. In the first Lu3+ site, Lu3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Lu–O bond distances ranging from 2.20–2.38 Å. In the second Lu3+ site, Lu3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Lu–O bond distances ranging from 2.15–2.47 Å. In the third Lu3+ site, Lu3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Lu–O bond distances ranging from 2.14–2.49 Å. In the fourth Lu3+ site, Lu3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Lu–O bond distances ranging from 2.19–2.82 Å. In the fifth Lu3+ site, Lu3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Lu–O bond distances ranging from 2.11–2.42 Å. In the sixth Lu3+ site, Lu3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Lu–O bond distances ranging from 2.15–2.47 Å. In the seventh Lu3+ site, Lu3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Lu–O bond distances ranging from 2.10–2.32 Å. In the eighth Lu3+ site, Lu3+ is bonded to six O2- atoms to form LuO6 octahedra that share corners with five TiO6 octahedra and edges with two equivalent LuO7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 56–63°. There are a spread of Lu–O bond distances ranging from 2.20–2.27 Å. In the ninth Lu3+ site, Lu3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Lu–O bond distances ranging from 2.12–2.40 Å. In the tenth Lu3+ site, Lu3+ is bonded to seven O2- atoms to form distorted LuO7 pentagonal bipyramids that share corners with two TiO6 octahedra, edges with two equivalent LuO6 octahedra, and edges with two TiO6 octahedra. The corner-sharing octahedra tilt angles range from 53–57°. There are a spread of Lu–O bond distances ranging from 2.19–2.51 Å. In the eleventh Lu3+ site, Lu3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Lu–O bond distances ranging from 2.14–2.57 Å. In the twelfth Lu3+ site, Lu3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Lu–O bond distances ranging from 2.16–2.51 Å. In the thirteenth Lu3+ site, Lu3+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are a spread of Lu–O bond distances ranging from 2.09–2.44 Å. In the fourteenth Lu3+ site, Lu3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Lu–O bond distances ranging from 2.13–2.47 Å. In the fifteenth Lu3+ site, Lu3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Lu–O bond distances ranging from 2.16–2.55 Å. In the sixteenth Lu3+ site, Lu3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Lu–O bond distances ranging from 2.14–2.78 Å. There are eight inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to five O2- atoms to form distorted corner-sharing TiO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 33°. There are a spread of Ti–O bond distances ranging from 1.81–2.09 Å. In the second Ti4+ site, Ti4+ is bonded in a distorted octahedral geometry to six O2- atoms. There are a spread of Ti–O bond distances ranging from 1.84–2.31 Å. In the third Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two equivalent LuO6 octahedra, corners with three TiO6 octahedra, a cornercorner with one LuO7 pentagonal bipyramid, and an edgeedge with one LuO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 30–61°. There are a spread of Ti–O bond distances ranging from 1.85–2.11 Å. In the fourth Ti4+ site, Ti4+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Ti–O bond distances ranging from 1.84–2.11 Å. In the fifth Ti4+ site, Ti4+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ti–O bond distances ranging from 1.87–2.30 Å. In the sixth Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share a cornercorner with one LuO6 octahedra, corners with two TiO6 octahedra, and a cornercorner with one TiO5 trigonal bipyramid. The corner-sharing octahedra tilt angles range from 49–59°. There are a spread of Ti–O bond distances ranging from 1.91–2.05 Å. In the seventh Ti4+ site, Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with two equivalent LuO6 octahedra, corners with three TiO6 octahedra, a cornercorner with one LuO7 pentagonal bipyramid, and an edgeedge with one LuO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 30–63°. There are a spread of Ti–O bond distances ranging from 1.88–2.09 Å. In the eighth Ti4+ site, Ti4+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Ti–O bond distances ranging from 1.79–2.08 Å. There are forty inequivalent O2- sites. In the first O2- site, O2- is bonded to two Lu3+ and two Ti4+ atoms to form OLu2Ti2 tetrahedra that share corners with three OLu4 tetrahedra and an edgeedge with one OLu2Ti2 tetrahedra. In the second O2- site, O2- is bonded to two Lu3+ and two Ti4+ atoms to form a mixture of distorted edge and corner-sharing OLu2Ti2 tetrahedra. In the third O2- site, O2- is bonded in a 3-coordinate geometry to three Lu3+ atoms. In the fourth O2- site, O2- is bonded to three Lu3+ and one Ti4+ atom to form OLu3Ti tetrahedra that share corners with seven OLu3Ti tetrahedra, a cornercorner with one OLu3Ti trigonal pyramid, and edges with three OLu2Ti2 tetrahedra. In the fifth O2- site, O2- is bonded to three Lu3+ and one Ti4+ atom to form distorted OLu3Ti trigonal pyramids that share corners with eight OLu4 tetrahedra and edges with three OLu2Ti2 tetrahedra. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to three Lu3+ and one Ti4+ atom. In the seventh O2- site, O2- is bonded to four Lu3+ atoms to form a mixture of distorted edge and corner-sharing OLu4 tetrahedra. In the eighth O2- site, O2- is bonded to two Lu3+ and two Ti4+ atoms to form a mixture of edge and corner-sharing OLu2Ti2 tetrahedra. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to three Lu3+ atoms. In the tenth O2- site, O2- is bonded to three Lu3+ and one Ti4+ atom to form OLu3Ti tetrahedra that share corners with seven OLu4 tetrahedra and edges with three OLu2Ti2 tetrahedra. In the eleventh O2- site, O2- is bonded to four Lu3+ atoms to form OLu4 tetrahedra that share corners with seven OLu3Ti tetrahedra, a cornercorner with one OLu3Ti trigonal pyramid, and edges with two OLu2Ti2 tetrahedra. In the twelfth O2- site, O2- is bonded to three Lu3+ and one Ti4+ atom to form a mixture of distorted edge and corner-sharing OLu3Ti tetrahedra. In the thirteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Lu3+ and two Ti4+ atoms. In the fourteenth O2- site, O2- is bonded in a 4-coordinate geometry to three Lu3+ and one Ti4+ atom. In the fifteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Lu3+ and two Ti4+ atoms. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Lu3+ and two Ti4+ atoms. In the seventeenth O2- site, O2- is bonded to three Lu3+ and one Ti4+ atom to form a mixture of distorted edge and corner-sharing OLu3Ti tetrahedra. In the eighteenth O2- site, O2- is bonded in a 4-coordinate geometry to three Lu3+ and one Ti4+ atom. In the nineteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Lu3+ and two Ti4+ atoms. In the twentieth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Lu3+ atoms. In the twenty-first O2- site, O2- is bonded to four Lu3+ atoms to form a mixture of edge and corner-sharing OLu4 tetrahedra. In the twenty-second O2- site, O2- is bonded in a 4-coordinate geometry to three Lu3+ and one Ti4+ atom. In the twenty-third O2- site, O2- is bonded to two Lu3+ and two Ti4+ atoms to form a mixture of distorted edge and corner-sharing OLu2Ti2 tetrahedra. In the twenty-fourth O2- site, O2- is bonded to four Lu3+ atoms to form a mixture of edge and corner-sharing OLu4 tetrahedra. In the twenty-fifth O2- site, O2- is bonded to three Lu3+ and one Ti4+ atom to form a mixture of edge and corner-sharing OLu3Ti tetrahedra. In the twenty-sixth O2- site, O2- is bonded to four Lu3+ atoms to form distorted OLu4 tetrahedra that share corners with four OLu4 tetrahedra and edges with three OLu3Ti tetrahedra. In the twenty-seventh O2- site, O2- is bonded to three Lu3+ and one Ti4+ atom to form OLu3Ti tetrahedra that share corners with five OLu3Ti tetrahedra, edges with three OLu4 tetrahedra, and an edgeedge with one OLu3Ti trigonal pyramid. In the twenty-eighth O2- site, O2- is bonded in a 4-coordinate geometry to three Lu3+ and one Ti4+ atom. In the twenty-ninth O2- site, O2- is bonded in a bent 150 degrees geometry to two Ti4+ atoms. In the thirtieth O2- site, O2- is bonded in a 4-coordinate geometry to three Lu3+ and one Ti4+ atom. In the thirty-first O2- site, O2- is bonded in a 4-coordinate geometry to three Lu3+ and one Ti4+ atom. In the thirty-second O2- site, O2- is bonded to three Lu3+ and one Ti4+ atom to form a mixture of edge and corner-sharing OLu3Ti tetrahedra. In the thirty-third O2- site, O2- is bonded to three Lu3+ and one Ti4+ atom to form OLu3Ti tetrahedra that share corners with four OLu3Ti tetrahedra and an edgeedge with one OLu4 tetrahedra. In the thirty-fourth O2- site, O2- is bonded in a 4-coordinate geometry to two Lu3+ and two Ti4+ atoms. In the thirty-fifth O2- site, O2- is bonded in a linear geometry to two Ti4+ atoms. In the thirty-sixth O2- site, O2- is bonded to four Lu3+ atoms to form corner-sharing OLu4 tetrahedra. In the thirty-seventh O2- site, O2- is bonded in a 4-coordinate geometry to two Lu3+ and two Ti4+ atoms. In the thirty-eighth O2- site, O2- is bonded in a 4-coordinate geometry to three Lu3+ and one Ti4+ atom. In the thirty-ninth O2- site, O2- is bonded in a 4-coordinate geometry to two Lu3+ and two Ti4+ atoms. In the fortieth O2- site, O2- is bonded in a 3-coordinate geometry to one Lu3+ and two Ti4+ atoms.