K2LiLa4O7 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and one O(7) atom. In the second K site, K(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(6), and one O(7) atom. Li(1) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form distorted LiO4 trigonal pyramids that share edges with two equivalent La(4)O6 pentagonal pyramids. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), one O(5), and one O(7) atom. In the second La site, La(2) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(4), and one O(5) atom. In the third La site, La(3) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom. In the fourth La site, La(4) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form distorted LaO6 pentagonal pyramids that share edges with two equivalent Li(1)O4 trigonal pyramids. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Li(1), one La(3), and one La(4) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one K(1), one K(2), one La(2), one La(3), and one La(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one K(1), one La(1), and one La(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Li(1), one La(1), one La(2), one La(3), and one La(4) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Li(1), one La(1), one La(2), one La(3), and one La(4) atom. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Li(1), one La(3), and one La(4) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one K(1), one K(2), one La(1), one La(3), and one La(4) atom.
K2LiLa4O7 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and one O(7) atom. The K(1)-O(1) bond length is 2.95 Å. The K(1)-O(2) bond length is 3.00 Å. The K(1)-O(3) bond length is 2.67 Å. The K(1)-O(6) bond length is 2.96 Å. The K(1)-O(7) bond length is 2.97 Å. In the second K site, K(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(6), and one O(7) atom. The K(2)-O(1) bond length is 3.23 Å. The K(2)-O(2) bond length is 3.12 Å. The K(2)-O(6) bond length is 3.23 Å. The K(2)-O(7) bond length is 3.14 Å. Li(1) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form distorted LiO4 trigonal pyramids that share edges with two equivalent La(4)O6 pentagonal pyramids. The Li(1)-O(1) bond length is 1.89 Å. The Li(1)-O(4) bond length is 2.10 Å. The Li(1)-O(5) bond length is 2.11 Å. The Li(1)-O(6) bond length is 1.90 Å. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), one O(5), and one O(7) atom. The La(1)-O(3) bond length is 2.21 Å. The La(1)-O(4) bond length is 2.35 Å. The La(1)-O(5) bond length is 2.52 Å. The La(1)-O(7) bond length is 2.28 Å. In the second La site, La(2) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(4), and one O(5) atom. The La(2)-O(2) bond length is 2.28 Å. The La(2)-O(3) bond length is 2.21 Å. The La(2)-O(4) bond length is 2.53 Å. The La(2)-O(5) bond length is 2.35 Å. In the third La site, La(3) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom. The La(3)-O(1) bond length is 2.35 Å. The La(3)-O(2) bond length is 2.61 Å. The La(3)-O(4) bond length is 2.54 Å. The La(3)-O(5) bond length is 2.54 Å. The La(3)-O(6) bond length is 2.35 Å. The La(3)-O(7) bond length is 2.61 Å. In the fourth La site, La(4) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form distorted LaO6 pentagonal pyramids that share edges with two equivalent Li(1)O4 trigonal pyramids. The La(4)-O(1) bond length is 2.44 Å. The La(4)-O(2) bond length is 2.41 Å. The La(4)-O(4) bond length is 2.60 Å. The La(4)-O(5) bond length is 2.60 Å. The La(4)-O(6) bond length is 2.44 Å. The La(4)-O(7) bond length is 2.41 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Li(1), one La(3), and one La(4) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one K(1), one K(2), one La(2), one La(3), and one La(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one K(1), one La(1), and one La(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Li(1), one La(1), one La(2), one La(3), and one La(4) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Li(1), one La(1), one La(2), one La(3), and one La(4) atom. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to one K(1), one K(2), one Li(1), one La(3), and one La(4) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one K(1), one K(2), one La(1), one La(3), and one La(4) atom.