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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on LuAlO3 by Materials Project

LuAlO3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Lu3+ is bonded to six equivalent O2- atoms to form distorted LuO6 octahedra that share corners with six equivalent AlO5 trigonal bipyramids and edges with six equivalent LuO6 octahedra. All Lu–O bond lengths are 2.21 Å. Al3+ is bonded to five O2- atoms to form AlO5 trigonal bipyramids that share corners with six equivalent LuO6 octahedra and corners with six equivalent AlO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 62°. There is two shorter (1.84 Å) and three longer (1.96 Å) Al–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to three equivalent Lu3+ and one Al3+ atom to form a mixture of distorted corner and edge-sharing OLu3Al tetrahedra. In the second O2- site, O2- is bonded in a trigonal planar geometry to three equivalent Al3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LuAlO3 by Materials Project

LuAlO3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Lu3+ sites. In the first Lu3+ site, Lu3+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are a spread of Lu–O bond distances ranging from 2.19–2.60 Å. In the second Lu3+ site, Lu3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of Lu–O bond distances ranging from 2.19–2.59 Å. There are two inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded in a distorted see-saw-like geometry to four O2- atoms. There are a spread of Al–O bond distances ranging from 1.75–1.80 Å. In the second Al3+ site, Al3+ is bonded in a distorted see-saw-like geometry to four O2- atoms. There is two shorter (1.78 Å) and two longer (1.79 Å) Al–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Lu3+ and two equivalent Al3+ atoms. In the second O2- site, O2- is bonded to three Lu3+ and one Al3+ atom to form a mixture of distorted edge and corner-sharing OLu3Al tetrahedra. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Lu3+ and two Al3+ atoms. In the fourth O2- site, O2- is bonded to three Lu3+ and one Al3+ atom to form a mixture of distorted edge and corner-sharing OLu3Al tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LuAlO3 by Materials Project

LuAlO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Lu3+ is bonded to twelve equivalent O2- atoms to form LuO12 cuboctahedra that share corners with twelve equivalent LuO12 cuboctahedra, faces with six equivalent LuO12 cuboctahedra, and faces with eight equivalent AlO6 octahedra. All Lu–O bond lengths are 2.60 Å. Al3+ is bonded to six equivalent O2- atoms to form AlO6 octahedra that share corners with six equivalent AlO6 octahedra and faces with eight equivalent LuO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Al–O bond lengths are 1.84 Å. O2- is bonded in a distorted linear geometry to four equivalent Lu3+ and two equivalent Al3+ atoms.

36 MATERIALS SCIENCE↗