Materials Data on BaLu2O4 by Materials Project
BaLu2O4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.71–2.92 Å. There are two inequivalent Lu3+ sites. In the first Lu3+ site, Lu3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing LuO6 octahedra. The corner-sharing octahedra tilt angles range from 50–57°. There are a spread of Lu–O bond distances ranging from 2.23–2.29 Å. In the second Lu3+ site, Lu3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing LuO6 octahedra. The corner-sharing octahedra tilt angles range from 50–57°. There are a spread of Lu–O bond distances ranging from 2.20–2.28 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Ba2+ and three Lu3+ atoms. In the second O2- site, O2- is bonded to two equivalent Ba2+ and three equivalent Lu3+ atoms to form distorted edge-sharing OBa2Lu3 square pyramids. In the third O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Ba2+ and three Lu3+ atoms. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Ba2+ and three equivalent Lu3+ atoms.