SrLa3(Cu2O5)2 crystallizes in the monoclinic Pm space group. Sr(1) is bonded in a 10-coordinate geometry to one O(1), one O(4), two equivalent O(3), two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to one O(2), one O(3), two equivalent O(10), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. In the second La site, La(2) is bonded in a 10-coordinate geometry to one O(2), one O(3), two equivalent O(1), two equivalent O(5), two equivalent O(7), and two equivalent O(9) atoms. In the third La site, La(3) is bonded in a 10-coordinate geometry to one O(1), one O(4), two equivalent O(10), two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(5), one O(7), one O(9), and two equivalent O(1) atoms to form corner-sharing CuO5 square pyramids. In the second Cu site, Cu(2) is bonded to one O(10), one O(5), one O(8), and two equivalent O(2) atoms to form corner-sharing CuO5 square pyramids. In the third Cu site, Cu(3) is bonded to one O(6), one O(7), one O(9), and two equivalent O(3) atoms to form corner-sharing CuO5 square pyramids. In the fourth Cu site, Cu(4) is bonded to one O(10), one O(6), one O(8), and two equivalent O(4) atoms to form corner-sharing CuO5 square pyramids. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Sr(1), one La(3), two equivalent La(2), and two equivalent Cu(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to one La(1), one La(2), two equivalent La(3), and two equivalent Cu(2) atoms. In the third O site, O(3) is bonded to two equivalent Sr(1), one La(1), one La(2), and two equivalent Cu(3) atoms to form distorted OSr2La2Cu2 octahedra that share corners with two equivalent O(5)La4Cu2 octahedra, corners with two equivalent O(6)Sr2La2Cu2 octahedra, corners with two equivalent O(7)Sr2La2Cu2 octahedra, corners with four equivalent O(3)Sr2La2Cu2 octahedra, edges with two equivalent O(4)SrLa3Cu2 octahedra, faces with two equivalent O(6)Sr2La2Cu2 octahedra, and faces with two equivalent O(7)Sr2La2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 4-70°. In the fourth O site, O(4) is bonded to one Sr(1), one La(3), two equivalent La(1), and two equivalent Cu(4) atoms to form distorted OSrLa3Cu2 octahedra that share corners with two equivalent O(5)La4Cu2 octahedra, corners with two equivalent O(6)Sr2La2Cu2 octahedra, corners with two equivalent O(7)Sr2La2Cu2 octahedra, corners with four equivalent O(4)SrLa3Cu2 octahedra, edges with two equivalent O(3)Sr2La2Cu2 octahedra, and faces with two equivalent O(6)Sr2La2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 3-75°. In the fifth O site, O(5) is bonded to two equivalent La(2), two equivalent La(3), one Cu(1), and one Cu(2) atom to form distorted OLa4Cu2 octahedra that share corners with two equivalent O(3)Sr2La2Cu2 octahedra, corners with two equivalent O(7)Sr2La2Cu2 octahedra, corners with two equivalent O(4)SrLa3Cu2 octahedra, edges with two equivalent O(5)La4Cu2 octahedra, and  a faceface with one O(7)Sr2La2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 52-56°. In the sixth O site, O(6) is bonded to two equivalent Sr(1), two equivalent La(1), one Cu(3), and one Cu(4) atom to form distorted OSr2La2Cu2 octahedra that share corners with two equivalent O(3)Sr2La2Cu2 octahedra, corners with two equivalent O(4)SrLa3Cu2 octahedra, corners with three equivalent O(7)Sr2La2Cu2 octahedra,  an edgeedge with one O(7)Sr2La2Cu2 octahedra, edges with two equivalent O(6)Sr2La2Cu2 octahedra, faces with two equivalent O(3)Sr2La2Cu2 octahedra, and faces with two equivalent O(4)SrLa3Cu2 octahedra. The corner-sharing octahedral tilt angles range from 1-70°. In the seventh O site, O(7) is bonded to two equivalent Sr(1), two equivalent La(2), one Cu(1), and one Cu(3) atom to form distorted OSr2La2Cu2 octahedra that share corners with two equivalent O(5)La4Cu2 octahedra, corners with two equivalent O(3)Sr2La2Cu2 octahedra, corners with two equivalent O(4)SrLa3Cu2 octahedra, corners with three equivalent O(6)Sr2La2Cu2 octahedra,  an edgeedge with one O(6)Sr2La2Cu2 octahedra, edges with two equivalent O(7)Sr2La2Cu2 octahedra,  a faceface with one O(5)La4Cu2 octahedra, and faces with two equivalent O(3)Sr2La2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 1-75°. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to two equivalent La(1), two equivalent La(3), one Cu(2), and one Cu(4) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent La(2), one Cu(1), and one Cu(3) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to two equivalent La(1), two equivalent La(3), one Cu(2), and one Cu(4) atom.
SrLa3(Cu2O5)2 crystallizes in the monoclinic Pm space group. Sr(1) is bonded in a 10-coordinate geometry to one O(1), one O(4), two equivalent O(3), two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms. The Sr(1)-O(1) bond length is 2.80 Å. The Sr(1)-O(4) bond length is 2.70 Å. There is one shorter (2.71 Å) and one longer (2.84 Å) Sr(1)-O(3) bond length. Both Sr(1)-O(6) bond lengths are 2.77 Å. Both Sr(1)-O(7) bond lengths are 2.58 Å. Both Sr(1)-O(9) bond lengths are 2.92 Å. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to one O(2), one O(3), two equivalent O(10), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. The La(1)-O(2) bond length is 2.79 Å. The La(1)-O(3) bond length is 2.56 Å. Both La(1)-O(10) bond lengths are 2.92 Å. There is one shorter (2.66 Å) and one longer (2.85 Å) La(1)-O(4) bond length. Both La(1)-O(6) bond lengths are 2.56 Å. Both La(1)-O(8) bond lengths are 2.51 Å. In the second La site, La(2) is bonded in a 10-coordinate geometry to one O(2), one O(3), two equivalent O(1), two equivalent O(5), two equivalent O(7), and two equivalent O(9) atoms. The La(2)-O(2) bond length is 2.68 Å. The La(2)-O(3) bond length is 2.71 Å. There is one shorter (2.66 Å) and one longer (2.91 Å) La(2)-O(1) bond length. Both La(2)-O(5) bond lengths are 2.70 Å. Both La(2)-O(7) bond lengths are 2.72 Å. Both La(2)-O(9) bond lengths are 2.46 Å. In the third La site, La(3) is bonded in a 10-coordinate geometry to one O(1), one O(4), two equivalent O(10), two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms. The La(3)-O(1) bond length is 2.57 Å. The La(3)-O(4) bond length is 2.65 Å. Both La(3)-O(10) bond lengths are 2.48 Å. There is one shorter (2.65 Å) and one longer (2.89 Å) La(3)-O(2) bond length. Both La(3)-O(5) bond lengths are 2.65 Å. Both La(3)-O(8) bond lengths are 2.87 Å. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(5), one O(7), one O(9), and two equivalent O(1) atoms to form corner-sharing CuO5 square pyramids. The Cu(1)-O(5) bond length is 1.96 Å. The Cu(1)-O(7) bond length is 2.20 Å. The Cu(1)-O(9) bond length is 1.88 Å. Both Cu(1)-O(1) bond lengths are 1.95 Å. In the second Cu site, Cu(2) is bonded to one O(10), one O(5), one O(8), and two equivalent O(2) atoms to form corner-sharing CuO5 square pyramids. The Cu(2)-O(10) bond length is 1.89 Å. The Cu(2)-O(5) bond length is 1.95 Å. The Cu(2)-O(8) bond length is 2.27 Å. Both Cu(2)-O(2) bond lengths are 1.95 Å. In the third Cu site, Cu(3) is bonded to one O(6), one O(7), one O(9), and two equivalent O(3) atoms to form corner-sharing CuO5 square pyramids. The Cu(3)-O(6) bond length is 1.96 Å. The Cu(3)-O(7) bond length is 1.89 Å. The Cu(3)-O(9) bond length is 2.27 Å. Both Cu(3)-O(3) bond lengths are 1.95 Å. In the fourth Cu site, Cu(4) is bonded to one O(10), one O(6), one O(8), and two equivalent O(4) atoms to form corner-sharing CuO5 square pyramids. The Cu(4)-O(10) bond length is 2.29 Å. The Cu(4)-O(6) bond length is 1.96 Å. The Cu(4)-O(8) bond length is 1.90 Å. Both Cu(4)-O(4) bond lengths are 1.95 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Sr(1), one La(3), two equivalent La(2), and two equivalent Cu(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to one La(1), one La(2), two equivalent La(3), and two equivalent Cu(2) atoms. In the third O site, O(3) is bonded to two equivalent Sr(1), one La(1), one La(2), and two equivalent Cu(3) atoms to form distorted OSr2La2Cu2 octahedra that share corners with two equivalent O(5)La4Cu2 octahedra, corners with two equivalent O(6)Sr2La2Cu2 octahedra, corners with two equivalent O(7)Sr2La2Cu2 octahedra, corners with four equivalent O(3)Sr2La2Cu2 octahedra, edges with two equivalent O(4)SrLa3Cu2 octahedra, faces with two equivalent O(6)Sr2La2Cu2 octahedra, and faces with two equivalent O(7)Sr2La2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 4-70°. In the fourth O site, O(4) is bonded to one Sr(1), one La(3), two equivalent La(1), and two equivalent Cu(4) atoms to form distorted OSrLa3Cu2 octahedra that share corners with two equivalent O(5)La4Cu2 octahedra, corners with two equivalent O(6)Sr2La2Cu2 octahedra, corners with two equivalent O(7)Sr2La2Cu2 octahedra, corners with four equivalent O(4)SrLa3Cu2 octahedra, edges with two equivalent O(3)Sr2La2Cu2 octahedra, and faces with two equivalent O(6)Sr2La2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 3-75°. In the fifth O site, O(5) is bonded to two equivalent La(2), two equivalent La(3), one Cu(1), and one Cu(2) atom to form distorted OLa4Cu2 octahedra that share corners with two equivalent O(3)Sr2La2Cu2 octahedra, corners with two equivalent O(7)Sr2La2Cu2 octahedra, corners with two equivalent O(4)SrLa3Cu2 octahedra, edges with two equivalent O(5)La4Cu2 octahedra, and  a faceface with one O(7)Sr2La2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 52-56°. In the sixth O site, O(6) is bonded to two equivalent Sr(1), two equivalent La(1), one Cu(3), and one Cu(4) atom to form distorted OSr2La2Cu2 octahedra that share corners with two equivalent O(3)Sr2La2Cu2 octahedra, corners with two equivalent O(4)SrLa3Cu2 octahedra, corners with three equivalent O(7)Sr2La2Cu2 octahedra,  an edgeedge with one O(7)Sr2La2Cu2 octahedra, edges with two equivalent O(6)Sr2La2Cu2 octahedra, faces with two equivalent O(3)Sr2La2Cu2 octahedra, and faces with two equivalent O(4)SrLa3Cu2 octahedra. The corner-sharing octahedral tilt angles range from 1-70°. In the seventh O site, O(7) is bonded to two equivalent Sr(1), two equivalent La(2), one Cu(1), and one Cu(3) atom to form distorted OSr2La2Cu2 octahedra that share corners with two equivalent O(5)La4Cu2 octahedra, corners with two equivalent O(3)Sr2La2Cu2 octahedra, corners with two equivalent O(4)SrLa3Cu2 octahedra, corners with three equivalent O(6)Sr2La2Cu2 octahedra,  an edgeedge with one O(6)Sr2La2Cu2 octahedra, edges with two equivalent O(7)Sr2La2Cu2 octahedra,  a faceface with one O(5)La4Cu2 octahedra, and faces with two equivalent O(3)Sr2La2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 1-75°. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to two equivalent La(1), two equivalent La(3), one Cu(2), and one Cu(4) atom. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent La(2), one Cu(1), and one Cu(3) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to two equivalent La(1), two equivalent La(3), one Cu(2), and one Cu(4) atom.