La8Cu3O16 crystallizes in the triclinic P1 space group. There are eight inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(13), one O(14), one O(15), one O(3), one O(4), one O(5), and one O(8) atom. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(11), one O(13), one O(16), one O(2), one O(4), one O(5), one O(6), one O(7), and one O(9) atom. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(13), one O(14), one O(15), one O(2), one O(3), and one O(8) atom. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to one O(10), one O(12), one O(13), one O(14), one O(15), one O(16), one O(6), one O(8), and one O(9) atom. In the fifth La site, La(5) is bonded in a 9-coordinate geometry to one O(11), one O(13), one O(14), one O(15), one O(16), one O(4), one O(7), one O(8), and one O(9) atom. In the sixth La site, La(6) is bonded in a 9-coordinate geometry to one O(10), one O(12), one O(16), one O(2), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the seventh La site, La(7) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(15), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. In the eighth La site, La(8) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(14), one O(2), one O(3), one O(5), one O(6), and one O(7) atom. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(10), one O(13), one O(16), one O(2), and one O(4) atom to form distorted corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles are 2°. In the second Cu site, Cu(2) is bonded to one O(11), one O(12), one O(14), one O(16), one O(3), and one O(6) atom to form corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the third Cu site, Cu(3) is bonded to one O(1), one O(11), one O(12), one O(15), one O(7), and one O(9) atom to form corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one La(1), one La(3), one La(7), one La(8), one Cu(1), and one Cu(3) atom to form distorted OLa4Cu2 octahedra that share  a cornercorner with one O(16)La4Cu2 octahedra,  a cornercorner with one O(9)La4Cu square pyramid, corners with two equivalent O(8)La5 trigonal bipyramids, corners with three equivalent O(5)La5 trigonal bipyramids, edges with two equivalent O(3)La4Cu square pyramids,  a faceface with one O(11)La4Cu2 octahedra,  a faceface with one O(12)La4Cu2 octahedra,  a faceface with one O(10)La4Cu square pyramid, and  a faceface with one O(4)La4Cu square pyramid. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded in a 6-coordinate geometry to one La(2), one La(3), one La(6), one La(7), one La(8), and one Cu(1) atom. In the third O site, O(3) is bonded to one La(1), one La(3), one La(7), one La(8), and one Cu(2) atom to form distorted OLa4Cu square pyramids that share  a cornercorner with one O(16)La4Cu2 octahedra,  a cornercorner with one O(5)La5 trigonal bipyramid, edges with two equivalent O(1)La4Cu2 octahedra,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  an edgeedge with one O(5)La5 trigonal bipyramid,  an edgeedge with one O(8)La5 trigonal bipyramid,  a faceface with one O(11)La4Cu2 octahedra, and  a faceface with one O(12)La4Cu2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the fourth O site, O(4) is bonded to one La(1), one La(2), one La(5), one La(7), and one Cu(1) atom to form distorted OLa4Cu square pyramids that share  a cornercorner with one O(10)La4Cu square pyramid,  a cornercorner with one O(5)La5 trigonal bipyramid,  an edgeedge with one O(11)La4Cu2 octahedra,  an edgeedge with one O(12)La4Cu2 octahedra,  an edgeedge with one O(3)La4Cu square pyramid,  an edgeedge with one O(9)La4Cu square pyramid,  an edgeedge with one O(5)La5 trigonal bipyramid,  an edgeedge with one O(8)La5 trigonal bipyramid,  a faceface with one O(1)La4Cu2 octahedra, and  a faceface with one O(16)La4Cu2 octahedra. In the fifth O site, O(5) is bonded to one La(1), one La(2), one La(6), one La(7), and one La(8) atom to form distorted OLa5 trigonal bipyramids that share corners with two equivalent O(11)La4Cu2 octahedra, corners with two equivalent O(16)La4Cu2 octahedra, corners with three equivalent O(1)La4Cu2 octahedra, corners with three equivalent O(12)La4Cu2 octahedra,  a cornercorner with one O(3)La4Cu square pyramid,  a cornercorner with one O(4)La4Cu square pyramid,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(3)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  an edgeedge with one O(9)La4Cu square pyramid, and  an edgeedge with one O(8)La5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 46-49°. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one La(2), one La(4), one La(6), one La(7), one La(8), and one Cu(2) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one La(2), one La(5), one La(6), one La(7), one La(8), and one Cu(3) atom. In the eighth O site, O(8) is bonded to one La(1), one La(3), one La(4), one La(5), and one La(6) atom to form distorted OLa5 trigonal bipyramids that share corners with two equivalent O(1)La4Cu2 octahedra, corners with two equivalent O(11)La4Cu2 octahedra, corners with three equivalent O(12)La4Cu2 octahedra, corners with three equivalent O(16)La4Cu2 octahedra,  a cornercorner with one O(10)La4Cu square pyramid,  a cornercorner with one O(9)La4Cu square pyramid,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(3)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  an edgeedge with one O(9)La4Cu square pyramid, and  an edgeedge with one O(5)La5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 46-48°. In the ninth O site, O(9) is bonded to one La(2), one La(4), one La(5), one La(6), and one Cu(3) atom to form distorted OLa4Cu square pyramids that share  a cornercorner with one O(1)La4Cu2 octahedra,  a cornercorner with one O(8)La5 trigonal bipyramid, edges with two equivalent O(16)La4Cu2 octahedra,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  an edgeedge with one O(5)La5 trigonal bipyramid,  an edgeedge with one O(8)La5 trigonal bipyramid,  a faceface with one O(11)La4Cu2 octahedra, and  a faceface with one O(12)La4Cu2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the tenth O site, O(10) is bonded to one La(3), one La(4), one La(6), one La(8), and one Cu(1) atom to form distorted OLa4Cu square pyramids that share  a cornercorner with one O(4)La4Cu square pyramid,  a cornercorner with one O(8)La5 trigonal bipyramid,  an edgeedge with one O(11)La4Cu2 octahedra,  an edgeedge with one O(12)La4Cu2 octahedra,  an edgeedge with one O(3)La4Cu square pyramid,  an edgeedge with one O(9)La4Cu square pyramid,  an edgeedge with one O(5)La5 trigonal bipyramid,  an edgeedge with one O(8)La5 trigonal bipyramid,  a faceface with one O(1)La4Cu2 octahedra, and  a faceface with one O(16)La4Cu2 octahedra. In the eleventh O site, O(11) is bonded to one La(2), one La(3), one La(5), one La(8), one Cu(2), and one Cu(3) atom to form distorted OLa4Cu2 octahedra that share corners with two equivalent O(12)La4Cu2 octahedra, corners with two equivalent O(5)La5 trigonal bipyramids, corners with two equivalent O(8)La5 trigonal bipyramids,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  a faceface with one O(1)La4Cu2 octahedra,  a faceface with one O(16)La4Cu2 octahedra,  a faceface with one O(3)La4Cu square pyramid, and  a faceface with one O(9)La4Cu square pyramid. The corner-sharing octahedral tilt angles range from 1-2°. In the twelfth O site, O(12) is bonded to one La(1), one La(4), one La(6), one La(7), one Cu(2), and one Cu(3) atom to form distorted OLa4Cu2 octahedra that share corners with two equivalent O(11)La4Cu2 octahedra, corners with three equivalent O(5)La5 trigonal bipyramids, corners with three equivalent O(8)La5 trigonal bipyramids,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  a faceface with one O(1)La4Cu2 octahedra,  a faceface with one O(16)La4Cu2 octahedra,  a faceface with one O(3)La4Cu square pyramid, and  a faceface with one O(9)La4Cu square pyramid. The corner-sharing octahedral tilt angles range from 1-2°. In the thirteenth O site, O(13) is bonded in a 6-coordinate geometry to one La(1), one La(2), one La(3), one La(4), one La(5), and one Cu(1) atom. In the fourteenth O site, O(14) is bonded in a 6-coordinate geometry to one La(1), one La(3), one La(4), one La(5), one La(8), and one Cu(2) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one La(1), one La(3), one La(4), one La(5), one La(7), and one Cu(3) atom. In the sixteenth O site, O(16) is bonded to one La(2), one La(4), one La(5), one La(6), one Cu(1), and one Cu(2) atom to form distorted OLa4Cu2 octahedra that share  a cornercorner with one O(1)La4Cu2 octahedra,  a cornercorner with one O(3)La4Cu square pyramid, corners with two equivalent O(5)La5 trigonal bipyramids, corners with three equivalent O(8)La5 trigonal bipyramids, edges with two equivalent O(9)La4Cu square pyramids,  a faceface with one O(11)La4Cu2 octahedra,  a faceface with one O(12)La4Cu2 octahedra,  a faceface with one O(10)La4Cu square pyramid, and  a faceface with one O(4)La4Cu square pyramid. The corner-sharing octahedra are not tilted.
La8Cu3O16 crystallizes in the triclinic P1 space group. There are eight inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(13), one O(14), one O(15), one O(3), one O(4), one O(5), and one O(8) atom. The La(1)-O(1) bond length is 2.65 Å. The La(1)-O(12) bond length is 2.62 Å. The La(1)-O(13) bond length is 2.74 Å. The La(1)-O(14) bond length is 2.70 Å. The La(1)-O(15) bond length is 2.88 Å. The La(1)-O(3) bond length is 2.55 Å. The La(1)-O(4) bond length is 2.54 Å. The La(1)-O(5) bond length is 2.34 Å. The La(1)-O(8) bond length is 2.70 Å. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(11), one O(13), one O(16), one O(2), one O(4), one O(5), one O(6), one O(7), and one O(9) atom. The La(2)-O(11) bond length is 2.66 Å. The La(2)-O(13) bond length is 2.36 Å. The La(2)-O(16) bond length is 2.69 Å. The La(2)-O(2) bond length is 2.71 Å. The La(2)-O(4) bond length is 2.60 Å. The La(2)-O(5) bond length is 2.67 Å. The La(2)-O(6) bond length is 2.83 Å. The La(2)-O(7) bond length is 2.65 Å. The La(2)-O(9) bond length is 2.58 Å. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(13), one O(14), one O(15), one O(2), one O(3), and one O(8) atom. The La(3)-O(1) bond length is 2.68 Å. The La(3)-O(10) bond length is 2.57 Å. The La(3)-O(11) bond length is 2.68 Å. The La(3)-O(13) bond length is 2.64 Å. The La(3)-O(14) bond length is 2.80 Å. The La(3)-O(15) bond length is 2.84 Å. The La(3)-O(2) bond length is 2.35 Å. The La(3)-O(3) bond length is 2.57 Å. The La(3)-O(8) bond length is 2.64 Å. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to one O(10), one O(12), one O(13), one O(14), one O(15), one O(16), one O(6), one O(8), and one O(9) atom. The La(4)-O(10) bond length is 2.61 Å. The La(4)-O(12) bond length is 2.70 Å. The La(4)-O(13) bond length is 2.73 Å. The La(4)-O(14) bond length is 2.78 Å. The La(4)-O(15) bond length is 2.71 Å. The La(4)-O(16) bond length is 2.66 Å. The La(4)-O(6) bond length is 2.36 Å. The La(4)-O(8) bond length is 2.63 Å. The La(4)-O(9) bond length is 2.58 Å. In the fifth La site, La(5) is bonded in a 9-coordinate geometry to one O(11), one O(13), one O(14), one O(15), one O(16), one O(4), one O(7), one O(8), and one O(9) atom. The La(5)-O(11) bond length is 2.68 Å. The La(5)-O(13) bond length is 2.83 Å. The La(5)-O(14) bond length is 2.84 Å. The La(5)-O(15) bond length is 2.63 Å. The La(5)-O(16) bond length is 2.65 Å. The La(5)-O(4) bond length is 2.58 Å. The La(5)-O(7) bond length is 2.34 Å. The La(5)-O(8) bond length is 2.66 Å. The La(5)-O(9) bond length is 2.58 Å. In the sixth La site, La(6) is bonded in a 9-coordinate geometry to one O(10), one O(12), one O(16), one O(2), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. The La(6)-O(10) bond length is 2.56 Å. The La(6)-O(12) bond length is 2.61 Å. The La(6)-O(16) bond length is 2.66 Å. The La(6)-O(2) bond length is 2.75 Å. The La(6)-O(5) bond length is 2.76 Å. The La(6)-O(6) bond length is 2.74 Å. The La(6)-O(7) bond length is 2.70 Å. The La(6)-O(8) bond length is 2.34 Å. The La(6)-O(9) bond length is 2.57 Å. In the seventh La site, La(7) is bonded in a 9-coordinate geometry to one O(1), one O(12), one O(15), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. The La(7)-O(1) bond length is 2.66 Å. The La(7)-O(12) bond length is 2.67 Å. The La(7)-O(15) bond length is 2.35 Å. The La(7)-O(2) bond length is 2.73 Å. The La(7)-O(3) bond length is 2.59 Å. The La(7)-O(4) bond length is 2.60 Å. The La(7)-O(5) bond length is 2.58 Å. The La(7)-O(6) bond length is 2.70 Å. The La(7)-O(7) bond length is 2.92 Å. In the eighth La site, La(8) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(14), one O(2), one O(3), one O(5), one O(6), and one O(7) atom. The La(8)-O(1) bond length is 2.65 Å. The La(8)-O(10) bond length is 2.58 Å. The La(8)-O(11) bond length is 2.63 Å. The La(8)-O(14) bond length is 2.34 Å. The La(8)-O(2) bond length is 2.78 Å. The La(8)-O(3) bond length is 2.58 Å. The La(8)-O(5) bond length is 2.66 Å. The La(8)-O(6) bond length is 2.74 Å. The La(8)-O(7) bond length is 2.83 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(10), one O(13), one O(16), one O(2), and one O(4) atom to form distorted corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles are 2°. The Cu(1)-O(1) bond length is 1.89 Å. The Cu(1)-O(10) bond length is 1.83 Å. The Cu(1)-O(13) bond length is 2.40 Å. The Cu(1)-O(16) bond length is 1.88 Å. The Cu(1)-O(2) bond length is 2.43 Å. The Cu(1)-O(4) bond length is 1.84 Å. In the second Cu site, Cu(2) is bonded to one O(11), one O(12), one O(14), one O(16), one O(3), and one O(6) atom to form corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. The Cu(2)-O(11) bond length is 1.89 Å. The Cu(2)-O(12) bond length is 1.89 Å. The Cu(2)-O(14) bond length is 2.41 Å. The Cu(2)-O(16) bond length is 1.89 Å. The Cu(2)-O(3) bond length is 1.85 Å. The Cu(2)-O(6) bond length is 2.40 Å. In the third Cu site, Cu(3) is bonded to one O(1), one O(11), one O(12), one O(15), one O(7), and one O(9) atom to form corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. The Cu(3)-O(1) bond length is 1.89 Å. The Cu(3)-O(11) bond length is 1.88 Å. The Cu(3)-O(12) bond length is 1.89 Å. The Cu(3)-O(15) bond length is 2.43 Å. The Cu(3)-O(7) bond length is 2.39 Å. The Cu(3)-O(9) bond length is 1.83 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one La(1), one La(3), one La(7), one La(8), one Cu(1), and one Cu(3) atom to form distorted OLa4Cu2 octahedra that share  a cornercorner with one O(16)La4Cu2 octahedra,  a cornercorner with one O(9)La4Cu square pyramid, corners with two equivalent O(8)La5 trigonal bipyramids, corners with three equivalent O(5)La5 trigonal bipyramids, edges with two equivalent O(3)La4Cu square pyramids,  a faceface with one O(11)La4Cu2 octahedra,  a faceface with one O(12)La4Cu2 octahedra,  a faceface with one O(10)La4Cu square pyramid, and  a faceface with one O(4)La4Cu square pyramid. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded in a 6-coordinate geometry to one La(2), one La(3), one La(6), one La(7), one La(8), and one Cu(1) atom. In the third O site, O(3) is bonded to one La(1), one La(3), one La(7), one La(8), and one Cu(2) atom to form distorted OLa4Cu square pyramids that share  a cornercorner with one O(16)La4Cu2 octahedra,  a cornercorner with one O(5)La5 trigonal bipyramid, edges with two equivalent O(1)La4Cu2 octahedra,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  an edgeedge with one O(5)La5 trigonal bipyramid,  an edgeedge with one O(8)La5 trigonal bipyramid,  a faceface with one O(11)La4Cu2 octahedra, and  a faceface with one O(12)La4Cu2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the fourth O site, O(4) is bonded to one La(1), one La(2), one La(5), one La(7), and one Cu(1) atom to form distorted OLa4Cu square pyramids that share  a cornercorner with one O(10)La4Cu square pyramid,  a cornercorner with one O(5)La5 trigonal bipyramid,  an edgeedge with one O(11)La4Cu2 octahedra,  an edgeedge with one O(12)La4Cu2 octahedra,  an edgeedge with one O(3)La4Cu square pyramid,  an edgeedge with one O(9)La4Cu square pyramid,  an edgeedge with one O(5)La5 trigonal bipyramid,  an edgeedge with one O(8)La5 trigonal bipyramid,  a faceface with one O(1)La4Cu2 octahedra, and  a faceface with one O(16)La4Cu2 octahedra. In the fifth O site, O(5) is bonded to one La(1), one La(2), one La(6), one La(7), and one La(8) atom to form distorted OLa5 trigonal bipyramids that share corners with two equivalent O(11)La4Cu2 octahedra, corners with two equivalent O(16)La4Cu2 octahedra, corners with three equivalent O(1)La4Cu2 octahedra, corners with three equivalent O(12)La4Cu2 octahedra,  a cornercorner with one O(3)La4Cu square pyramid,  a cornercorner with one O(4)La4Cu square pyramid,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(3)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  an edgeedge with one O(9)La4Cu square pyramid, and  an edgeedge with one O(8)La5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 46-49°. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one La(2), one La(4), one La(6), one La(7), one La(8), and one Cu(2) atom. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one La(2), one La(5), one La(6), one La(7), one La(8), and one Cu(3) atom. In the eighth O site, O(8) is bonded to one La(1), one La(3), one La(4), one La(5), and one La(6) atom to form distorted OLa5 trigonal bipyramids that share corners with two equivalent O(1)La4Cu2 octahedra, corners with two equivalent O(11)La4Cu2 octahedra, corners with three equivalent O(12)La4Cu2 octahedra, corners with three equivalent O(16)La4Cu2 octahedra,  a cornercorner with one O(10)La4Cu square pyramid,  a cornercorner with one O(9)La4Cu square pyramid,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(3)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  an edgeedge with one O(9)La4Cu square pyramid, and  an edgeedge with one O(5)La5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 46-48°. In the ninth O site, O(9) is bonded to one La(2), one La(4), one La(5), one La(6), and one Cu(3) atom to form distorted OLa4Cu square pyramids that share  a cornercorner with one O(1)La4Cu2 octahedra,  a cornercorner with one O(8)La5 trigonal bipyramid, edges with two equivalent O(16)La4Cu2 octahedra,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  an edgeedge with one O(5)La5 trigonal bipyramid,  an edgeedge with one O(8)La5 trigonal bipyramid,  a faceface with one O(11)La4Cu2 octahedra, and  a faceface with one O(12)La4Cu2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the tenth O site, O(10) is bonded to one La(3), one La(4), one La(6), one La(8), and one Cu(1) atom to form distorted OLa4Cu square pyramids that share  a cornercorner with one O(4)La4Cu square pyramid,  a cornercorner with one O(8)La5 trigonal bipyramid,  an edgeedge with one O(11)La4Cu2 octahedra,  an edgeedge with one O(12)La4Cu2 octahedra,  an edgeedge with one O(3)La4Cu square pyramid,  an edgeedge with one O(9)La4Cu square pyramid,  an edgeedge with one O(5)La5 trigonal bipyramid,  an edgeedge with one O(8)La5 trigonal bipyramid,  a faceface with one O(1)La4Cu2 octahedra, and  a faceface with one O(16)La4Cu2 octahedra. In the eleventh O site, O(11) is bonded to one La(2), one La(3), one La(5), one La(8), one Cu(2), and one Cu(3) atom to form distorted OLa4Cu2 octahedra that share corners with two equivalent O(12)La4Cu2 octahedra, corners with two equivalent O(5)La5 trigonal bipyramids, corners with two equivalent O(8)La5 trigonal bipyramids,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  a faceface with one O(1)La4Cu2 octahedra,  a faceface with one O(16)La4Cu2 octahedra,  a faceface with one O(3)La4Cu square pyramid, and  a faceface with one O(9)La4Cu square pyramid. The corner-sharing octahedral tilt angles range from 1-2°. In the twelfth O site, O(12) is bonded to one La(1), one La(4), one La(6), one La(7), one Cu(2), and one Cu(3) atom to form distorted OLa4Cu2 octahedra that share corners with two equivalent O(11)La4Cu2 octahedra, corners with three equivalent O(5)La5 trigonal bipyramids, corners with three equivalent O(8)La5 trigonal bipyramids,  an edgeedge with one O(10)La4Cu square pyramid,  an edgeedge with one O(4)La4Cu square pyramid,  a faceface with one O(1)La4Cu2 octahedra,  a faceface with one O(16)La4Cu2 octahedra,  a faceface with one O(3)La4Cu square pyramid, and  a faceface with one O(9)La4Cu square pyramid. The corner-sharing octahedral tilt angles range from 1-2°. In the thirteenth O site, O(13) is bonded in a 6-coordinate geometry to one La(1), one La(2), one La(3), one La(4), one La(5), and one Cu(1) atom. In the fourteenth O site, O(14) is bonded in a 6-coordinate geometry to one La(1), one La(3), one La(4), one La(5), one La(8), and one Cu(2) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one La(1), one La(3), one La(4), one La(5), one La(7), and one Cu(3) atom. In the sixteenth O site, O(16) is bonded to one La(2), one La(4), one La(5), one La(6), one Cu(1), and one Cu(2) atom to form distorted OLa4Cu2 octahedra that share  a cornercorner with one O(1)La4Cu2 octahedra,  a cornercorner with one O(3)La4Cu square pyramid, corners with two equivalent O(5)La5 trigonal bipyramids, corners with three equivalent O(8)La5 trigonal bipyramids, edges with two equivalent O(9)La4Cu square pyramids,  a faceface with one O(11)La4Cu2 octahedra,  a faceface with one O(12)La4Cu2 octahedra,  a faceface with one O(10)La4Cu square pyramid, and  a faceface with one O(4)La4Cu square pyramid. The corner-sharing octahedra are not tilted.