Materials Data on LiLaNb4O12 by Materials Project
LiLaNb4O12 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to twelve O2- atoms to form LiO12 cuboctahedra that share corners with two equivalent LiO12 cuboctahedra, faces with four LaO12 cuboctahedra, and faces with eight NbO6 octahedra. There are a spread of Li–O bond distances ranging from 2.72–2.83 Å. In the second Li1+ site, Li1+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. All Li–O bond lengths are 2.69 Å. In the third Li1+ site, Li1+ is bonded to twelve O2- atoms to form LiO12 cuboctahedra that share corners with two equivalent LiO12 cuboctahedra, faces with four LaO12 cuboctahedra, and faces with eight NbO6 octahedra. There are a spread of Li–O bond distances ranging from 2.72–2.80 Å. There are three inequivalent La3+ sites. In the first La3+ site, La3+ is bonded to twelve O2- atoms to form LaO12 cuboctahedra that share corners with four LaO12 cuboctahedra, faces with three LiO12 cuboctahedra, and faces with eight NbO6 octahedra. There are a spread of La–O bond distances ranging from 2.65–2.82 Å. In the second La3+ site, La3+ is bonded to twelve O2- atoms to form LaO12 cuboctahedra that share corners with four LaO12 cuboctahedra, faces with three LiO12 cuboctahedra, and faces with eight NbO6 octahedra. There are a spread of La–O bond distances ranging from 2.65–2.83 Å. In the third La3+ site, La3+ is bonded to twelve O2- atoms to form LaO12 cuboctahedra that share corners with four LaO12 cuboctahedra, faces with two LiO12 cuboctahedra, and faces with eight NbO6 octahedra. There are a spread of La–O bond distances ranging from 2.65–2.82 Å. There are six inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra, faces with two LiO12 cuboctahedra, and faces with two LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 1–16°. There are a spread of Nb–O bond distances ranging from 1.94–2.08 Å. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra, a faceface with one LiO12 cuboctahedra, and faces with two LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 1–14°. There are a spread of Nb–O bond distances ranging from 1.95–2.06 Å. In the third Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra, a faceface with one LiO12 cuboctahedra, and faces with two LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 3–13°. There are a spread of Nb–O bond distances ranging from 1.96–2.05 Å. In the fourth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra, a faceface with one LiO12 cuboctahedra, and faces with two LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 3–14°. There are a spread of Nb–O bond distances ranging from 1.97–2.04 Å. In the fifth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra, a faceface with one LiO12 cuboctahedra, and faces with two LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 2–14°. There are a spread of Nb–O bond distances ranging from 1.98–2.03 Å. In the sixth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO6 octahedra, faces with two LiO12 cuboctahedra, and faces with two LaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 1–13°. There are a spread of Nb–O bond distances ranging from 1.97–2.04 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted T-shaped geometry to one La3+ and two Nb5+ atoms. In the second O2- site, O2- is bonded in a distorted linear geometry to one Li1+, two La3+, and two Nb5+ atoms. In the third O2- site, O2- is bonded in a linear geometry to two Nb5+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one La3+, and two Nb5+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one La3+, and two Nb5+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one La3+, and two equivalent Nb5+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one La3+, and two equivalent Nb5+ atoms. In the eighth O2- site, O2- is bonded in a distorted T-shaped geometry to one La3+ and two equivalent Nb5+ atoms. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, one La3+, and two equivalent Nb5+ atoms. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one La3+ and two equivalent Nb5+ atoms. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, one La3+, and two equivalent Nb5+ atoms. In the twelfth O2- site, O2- is bonded in a distorted linear geometry to one La3+ and two Nb5+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted linear geometry to one Li1+, two La3+, and two Nb5+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted linear geometry to two Li1+, two La3+, and two Nb5+ atoms. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, one La3+, and two Nb5+ atoms. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one La3+, and two Nb5+ atoms. In the seventeenth O2- site, O2- is bonded in a distorted T-shaped geometry to one Li1+ and two Nb5+ atoms. In the eighteenth O2- site, O2- is bonded in a distorted T-shaped geometry to one Li1+ and two Nb5+ atoms. In the nineteenth O2- site, O2- is bonded in a distorted T-shaped geometry to one La3+ and two equivalent Nb5+ atoms. In the twentieth O2- site, O2- is bonded in a 2-coordinate geometry to one La3+ and two equivalent Nb5+ atoms. In the twenty-first O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, one La3+, and two equivalent Nb5+ atoms. In the twenty-second O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one La3+, and two equivalent Nb5+ atoms. In the twenty-third O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one La3+, and two equivalent Nb5+ atoms. In the twenty-fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one La3+, and two equivalent Nb5+ atoms.