Sr4CaYCo2(Cu2O7)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(6), one O(7), two equivalent O(4), and two equivalent O(5) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(6), one O(7), two equivalent O(4), and two equivalent O(5) atoms. Ca(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms. Y(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms. Co(1) is bonded to one O(4), one O(5), and two equivalent O(3) atoms to form distorted CoO4 trigonal pyramids that share  a cornercorner with one Cu(1)O5 square pyramid,  a cornercorner with one Cu(2)O5 square pyramid, and  an edgeedge with one Co(1)O4 trigonal pyramid. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(2), one O(4), one O(6), and one O(7) atom to form CuO5 square pyramids that share corners with four equivalent Cu(2)O5 square pyramids and  a cornercorner with one Co(1)O4 trigonal pyramid. In the second Cu site, Cu(2) is bonded to one O(1), one O(2), one O(5), one O(6), and one O(7) atom to form CuO5 square pyramids that share corners with four equivalent Cu(1)O5 square pyramids and  a cornercorner with one Co(1)O4 trigonal pyramid. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one Ca(1), one Y(1), one Cu(1), and one Cu(2) atom to form distorted OSr2CaYCu2 octahedra that share corners with two equivalent O(1)Sr2CaYCu2 octahedra, corners with two equivalent O(2)Sr2CaYCu2 octahedra, corners with two equivalent O(6)Sr2CaYCu2 octahedra, corners with two equivalent O(7)Sr2CaYCu2 octahedra, corners with two equivalent O(3)Sr2Co2 trigonal pyramids, edges with three equivalent O(6)Sr2CaYCu2 octahedra, faces with two equivalent O(2)Sr2CaYCu2 octahedra, and faces with two equivalent O(7)Sr2CaYCu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Ca(1), one Y(1), one Cu(1), and one Cu(2) atom to form distorted OSr2CaYCu2 octahedra that share corners with two equivalent O(1)Sr2CaYCu2 octahedra, corners with two equivalent O(2)Sr2CaYCu2 octahedra, corners with two equivalent O(6)Sr2CaYCu2 octahedra, corners with two equivalent O(7)Sr2CaYCu2 octahedra, corners with two equivalent O(3)Sr2Co2 trigonal pyramids, edges with three equivalent O(7)Sr2CaYCu2 octahedra, faces with two equivalent O(1)Sr2CaYCu2 octahedra, and faces with two equivalent O(6)Sr2CaYCu2 octahedra. The corner-sharing octahedral tilt angles range from 0-69°. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), and two equivalent Co(1) atoms to form OSr2Co2 trigonal pyramids that share corners with two equivalent O(1)Sr2CaYCu2 octahedra, corners with two equivalent O(2)Sr2CaYCu2 octahedra, corners with two equivalent O(6)Sr2CaYCu2 octahedra, corners with two equivalent O(7)Sr2CaYCu2 octahedra, and  an edgeedge with one O(3)Sr2Co2 trigonal pyramid. The corner-sharing octahedral tilt angles range from 26-64°. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Co(1), and one Cu(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Co(1), and one Cu(2) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(2), one Ca(1), one Y(1), one Cu(1), and one Cu(2) atom to form distorted OSr2CaYCu2 octahedra that share corners with two equivalent O(1)Sr2CaYCu2 octahedra, corners with two equivalent O(2)Sr2CaYCu2 octahedra, corners with two equivalent O(6)Sr2CaYCu2 octahedra, corners with two equivalent O(7)Sr2CaYCu2 octahedra, corners with two equivalent O(3)Sr2Co2 trigonal pyramids, edges with three equivalent O(1)Sr2CaYCu2 octahedra, faces with two equivalent O(2)Sr2CaYCu2 octahedra, and faces with two equivalent O(7)Sr2CaYCu2 octahedra. The corner-sharing octahedral tilt angles range from 0-69°. In the seventh O site, O(7) is bonded to one Sr(1), one Sr(2), one Ca(1), one Y(1), one Cu(1), and one Cu(2) atom to form distorted OSr2CaYCu2 octahedra that share corners with two equivalent O(1)Sr2CaYCu2 octahedra, corners with two equivalent O(2)Sr2CaYCu2 octahedra, corners with two equivalent O(6)Sr2CaYCu2 octahedra, corners with two equivalent O(7)Sr2CaYCu2 octahedra, corners with two equivalent O(3)Sr2Co2 trigonal pyramids, edges with three equivalent O(2)Sr2CaYCu2 octahedra, faces with two equivalent O(1)Sr2CaYCu2 octahedra, and faces with two equivalent O(6)Sr2CaYCu2 octahedra. The corner-sharing octahedral tilt angles range from 0-69°.
Sr4CaYCo2(Cu2O7)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(6), one O(7), two equivalent O(4), and two equivalent O(5) atoms. The Sr(1)-O(1) bond length is 2.77 Å. The Sr(1)-O(2) bond length is 2.73 Å. The Sr(1)-O(3) bond length is 2.42 Å. The Sr(1)-O(6) bond length is 2.76 Å. The Sr(1)-O(7) bond length is 2.74 Å. There is one shorter (2.63 Å) and one longer (2.95 Å) Sr(1)-O(4) bond length. There is one shorter (2.69 Å) and one longer (2.88 Å) Sr(1)-O(5) bond length. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(6), one O(7), two equivalent O(4), and two equivalent O(5) atoms. The Sr(2)-O(1) bond length is 2.81 Å. The Sr(2)-O(2) bond length is 2.78 Å. The Sr(2)-O(3) bond length is 2.41 Å. The Sr(2)-O(6) bond length is 2.77 Å. The Sr(2)-O(7) bond length is 2.78 Å. There is one shorter (2.65 Å) and one longer (2.93 Å) Sr(2)-O(4) bond length. There is one shorter (2.60 Å) and one longer (2.99 Å) Sr(2)-O(5) bond length. Ca(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms. Both Ca(1)-O(1) bond lengths are 2.51 Å. Both Ca(1)-O(2) bond lengths are 2.48 Å. Both Ca(1)-O(6) bond lengths are 2.44 Å. Both Ca(1)-O(7) bond lengths are 2.49 Å. Y(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(6), and two equivalent O(7) atoms. Both Y(1)-O(1) bond lengths are 2.46 Å. Both Y(1)-O(2) bond lengths are 2.41 Å. Both Y(1)-O(6) bond lengths are 2.39 Å. Both Y(1)-O(7) bond lengths are 2.41 Å. Co(1) is bonded to one O(4), one O(5), and two equivalent O(3) atoms to form distorted CoO4 trigonal pyramids that share  a cornercorner with one Cu(1)O5 square pyramid,  a cornercorner with one Cu(2)O5 square pyramid, and  an edgeedge with one Co(1)O4 trigonal pyramid. The Co(1)-O(4) bond length is 1.82 Å. The Co(1)-O(5) bond length is 1.82 Å. Both Co(1)-O(3) bond lengths are 1.96 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(2), one O(4), one O(6), and one O(7) atom to form CuO5 square pyramids that share corners with four equivalent Cu(2)O5 square pyramids and  a cornercorner with one Co(1)O4 trigonal pyramid. The Cu(1)-O(1) bond length is 1.92 Å. The Cu(1)-O(2) bond length is 1.94 Å. The Cu(1)-O(4) bond length is 2.38 Å. The Cu(1)-O(6) bond length is 1.94 Å. The Cu(1)-O(7) bond length is 1.94 Å. In the second Cu site, Cu(2) is bonded to one O(1), one O(2), one O(5), one O(6), and one O(7) atom to form CuO5 square pyramids that share corners with four equivalent Cu(1)O5 square pyramids and  a cornercorner with one Co(1)O4 trigonal pyramid. The Cu(2)-O(1) bond length is 1.92 Å. The Cu(2)-O(2) bond length is 1.95 Å. The Cu(2)-O(5) bond length is 2.37 Å. The Cu(2)-O(6) bond length is 1.94 Å. The Cu(2)-O(7) bond length is 1.94 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one Ca(1), one Y(1), one Cu(1), and one Cu(2) atom to form distorted OSr2CaYCu2 octahedra that share corners with two equivalent O(1)Sr2CaYCu2 octahedra, corners with two equivalent O(2)Sr2CaYCu2 octahedra, corners with two equivalent O(6)Sr2CaYCu2 octahedra, corners with two equivalent O(7)Sr2CaYCu2 octahedra, corners with two equivalent O(3)Sr2Co2 trigonal pyramids, edges with three equivalent O(6)Sr2CaYCu2 octahedra, faces with two equivalent O(2)Sr2CaYCu2 octahedra, and faces with two equivalent O(7)Sr2CaYCu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Ca(1), one Y(1), one Cu(1), and one Cu(2) atom to form distorted OSr2CaYCu2 octahedra that share corners with two equivalent O(1)Sr2CaYCu2 octahedra, corners with two equivalent O(2)Sr2CaYCu2 octahedra, corners with two equivalent O(6)Sr2CaYCu2 octahedra, corners with two equivalent O(7)Sr2CaYCu2 octahedra, corners with two equivalent O(3)Sr2Co2 trigonal pyramids, edges with three equivalent O(7)Sr2CaYCu2 octahedra, faces with two equivalent O(1)Sr2CaYCu2 octahedra, and faces with two equivalent O(6)Sr2CaYCu2 octahedra. The corner-sharing octahedral tilt angles range from 0-69°. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), and two equivalent Co(1) atoms to form OSr2Co2 trigonal pyramids that share corners with two equivalent O(1)Sr2CaYCu2 octahedra, corners with two equivalent O(2)Sr2CaYCu2 octahedra, corners with two equivalent O(6)Sr2CaYCu2 octahedra, corners with two equivalent O(7)Sr2CaYCu2 octahedra, and  an edgeedge with one O(3)Sr2Co2 trigonal pyramid. The corner-sharing octahedral tilt angles range from 26-64°. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Co(1), and one Cu(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Co(1), and one Cu(2) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(2), one Ca(1), one Y(1), one Cu(1), and one Cu(2) atom to form distorted OSr2CaYCu2 octahedra that share corners with two equivalent O(1)Sr2CaYCu2 octahedra, corners with two equivalent O(2)Sr2CaYCu2 octahedra, corners with two equivalent O(6)Sr2CaYCu2 octahedra, corners with two equivalent O(7)Sr2CaYCu2 octahedra, corners with two equivalent O(3)Sr2Co2 trigonal pyramids, edges with three equivalent O(1)Sr2CaYCu2 octahedra, faces with two equivalent O(2)Sr2CaYCu2 octahedra, and faces with two equivalent O(7)Sr2CaYCu2 octahedra. The corner-sharing octahedral tilt angles range from 0-69°. In the seventh O site, O(7) is bonded to one Sr(1), one Sr(2), one Ca(1), one Y(1), one Cu(1), and one Cu(2) atom to form distorted OSr2CaYCu2 octahedra that share corners with two equivalent O(1)Sr2CaYCu2 octahedra, corners with two equivalent O(2)Sr2CaYCu2 octahedra, corners with two equivalent O(6)Sr2CaYCu2 octahedra, corners with two equivalent O(7)Sr2CaYCu2 octahedra, corners with two equivalent O(3)Sr2Co2 trigonal pyramids, edges with three equivalent O(2)Sr2CaYCu2 octahedra, faces with two equivalent O(1)Sr2CaYCu2 octahedra, and faces with two equivalent O(6)Sr2CaYCu2 octahedra. The corner-sharing octahedral tilt angles range from 0-69°.