Sr4CaYGa2(Cu2O7)2 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one O(11), one O(12), one O(14), one O(3), and one O(4) atom. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(1), one O(13), one O(14), one O(2), one O(3), one O(5), and one O(7) atom. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(12), one O(13), one O(2), one O(4), and one O(9) atom. In the fourth Sr site, Sr(4) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(13), one O(14), one O(5), one O(6), and one O(7) atom. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(12), one O(14), one O(2), and one O(8) atom. Y(1) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(13), one O(4), one O(6), one O(7), and one O(9) atom. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a linear geometry to one O(12) and one O(3) atom. In the second Cu site, Cu(2) is bonded in a distorted T-shaped geometry to one O(14), one O(7), and one O(8) atom. In the third Cu site, Cu(3) is bonded in a T-shaped geometry to one O(1), one O(5), and one O(8) atom. In the fourth Cu site, Cu(4) is bonded in a distorted trigonal planar geometry to one O(1), one O(2), and one O(4) atom. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted tetrahedral geometry to one O(4), one O(5), one O(6), and one O(9) atom. In the second Ga site, Ga(2) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(3), and one O(6) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(4), one Ca(1), one Cu(3), and one Cu(4) atom. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Sr(2), one Sr(3), one Ca(1), and one Cu(4) atom. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one Cu(1), and one Ga(2) atom to form distorted OSr2GaCu tetrahedra that share  a cornercorner with one O(5)Sr2GaCu tetrahedra,  a cornercorner with one O(7)Sr2YCu trigonal pyramid, and  a cornercorner with one O(11)Sr2YO trigonal pyramid. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(3), one Y(1), one Cu(4), and one Ga(1) atom. In the fifth O site, O(5) is bonded to one Sr(2), one Sr(4), one Cu(3), and one Ga(1) atom to form distorted OSr2GaCu tetrahedra that share  a cornercorner with one O(3)Sr2GaCu tetrahedra and  an edgeedge with one O(7)Sr2YCu trigonal pyramid. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sr(4), one Y(1), one Ga(1), and one Ga(2) atom. In the seventh O site, O(7) is bonded to one Sr(2), one Sr(4), one Y(1), and one Cu(2) atom to form distorted OSr2YCu trigonal pyramids that share  a cornercorner with one O(3)Sr2GaCu tetrahedra,  a cornercorner with one O(11)Sr2YO trigonal pyramid, and  an edgeedge with one O(5)Sr2GaCu tetrahedra. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Ca(1), one Cu(2), and one Cu(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sr(3), one Y(1), and one Ga(1) atom. In the tenth O site, O(10) is bonded in a distorted see-saw-like geometry to one Sr(3), one Ca(1), one Y(1), and one Ga(2) atom. In the eleventh O site, O(11) is bonded to one Sr(1), one Sr(3), one Y(1), and one O(13) atom to form distorted OSr2YO trigonal pyramids that share  a cornercorner with one O(3)Sr2GaCu tetrahedra and  a cornercorner with one O(7)Sr2YCu trigonal pyramid. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), one Ca(1), and one Cu(1) atom. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(3), one Sr(4), one Y(1), and one O(11) atom. In the fourteenth O site, O(14) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Ca(1), and one Cu(2) atom.
Sr4CaYGa2(Cu2O7)2 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one O(11), one O(12), one O(14), one O(3), and one O(4) atom. The Sr(1)-O(11) bond length is 2.57 Å. The Sr(1)-O(12) bond length is 2.38 Å. The Sr(1)-O(14) bond length is 2.45 Å. The Sr(1)-O(3) bond length is 2.63 Å. The Sr(1)-O(4) bond length is 2.62 Å. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(1), one O(13), one O(14), one O(2), one O(3), one O(5), and one O(7) atom. The Sr(2)-O(1) bond length is 3.06 Å. The Sr(2)-O(13) bond length is 2.97 Å. The Sr(2)-O(14) bond length is 2.56 Å. The Sr(2)-O(2) bond length is 2.46 Å. The Sr(2)-O(3) bond length is 2.54 Å. The Sr(2)-O(5) bond length is 2.52 Å. The Sr(2)-O(7) bond length is 2.63 Å. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(12), one O(13), one O(2), one O(4), and one O(9) atom. The Sr(3)-O(10) bond length is 2.70 Å. The Sr(3)-O(11) bond length is 2.62 Å. The Sr(3)-O(12) bond length is 2.60 Å. The Sr(3)-O(13) bond length is 2.74 Å. The Sr(3)-O(2) bond length is 2.53 Å. The Sr(3)-O(4) bond length is 2.95 Å. The Sr(3)-O(9) bond length is 2.32 Å. In the fourth Sr site, Sr(4) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(13), one O(14), one O(5), one O(6), and one O(7) atom. The Sr(4)-O(1) bond length is 2.59 Å. The Sr(4)-O(12) bond length is 2.98 Å. The Sr(4)-O(13) bond length is 2.74 Å. The Sr(4)-O(14) bond length is 2.54 Å. The Sr(4)-O(5) bond length is 2.53 Å. The Sr(4)-O(6) bond length is 3.03 Å. The Sr(4)-O(7) bond length is 2.42 Å. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(12), one O(14), one O(2), and one O(8) atom. The Ca(1)-O(1) bond length is 2.40 Å. The Ca(1)-O(10) bond length is 2.48 Å. The Ca(1)-O(12) bond length is 2.42 Å. The Ca(1)-O(14) bond length is 2.96 Å. The Ca(1)-O(2) bond length is 2.34 Å. The Ca(1)-O(8) bond length is 2.31 Å. Y(1) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(13), one O(4), one O(6), one O(7), and one O(9) atom. The Y(1)-O(10) bond length is 2.48 Å. The Y(1)-O(11) bond length is 2.30 Å. The Y(1)-O(13) bond length is 2.43 Å. The Y(1)-O(4) bond length is 2.73 Å. The Y(1)-O(6) bond length is 2.75 Å. The Y(1)-O(7) bond length is 2.19 Å. The Y(1)-O(9) bond length is 2.16 Å. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a linear geometry to one O(12) and one O(3) atom. The Cu(1)-O(12) bond length is 1.81 Å. The Cu(1)-O(3) bond length is 1.88 Å. In the second Cu site, Cu(2) is bonded in a distorted T-shaped geometry to one O(14), one O(7), and one O(8) atom. The Cu(2)-O(14) bond length is 1.91 Å. The Cu(2)-O(7) bond length is 1.86 Å. The Cu(2)-O(8) bond length is 1.81 Å. In the third Cu site, Cu(3) is bonded in a T-shaped geometry to one O(1), one O(5), and one O(8) atom. The Cu(3)-O(1) bond length is 1.91 Å. The Cu(3)-O(5) bond length is 2.00 Å. The Cu(3)-O(8) bond length is 1.82 Å. In the fourth Cu site, Cu(4) is bonded in a distorted trigonal planar geometry to one O(1), one O(2), and one O(4) atom. The Cu(4)-O(1) bond length is 1.87 Å. The Cu(4)-O(2) bond length is 1.89 Å. The Cu(4)-O(4) bond length is 1.89 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted tetrahedral geometry to one O(4), one O(5), one O(6), and one O(9) atom. The Ga(1)-O(4) bond length is 1.96 Å. The Ga(1)-O(5) bond length is 1.86 Å. The Ga(1)-O(6) bond length is 1.91 Å. The Ga(1)-O(9) bond length is 1.81 Å. In the second Ga site, Ga(2) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(3), and one O(6) atom. The Ga(2)-O(10) bond length is 1.80 Å. The Ga(2)-O(3) bond length is 1.82 Å. The Ga(2)-O(6) bond length is 1.81 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(4), one Ca(1), one Cu(3), and one Cu(4) atom. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Sr(2), one Sr(3), one Ca(1), and one Cu(4) atom. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one Cu(1), and one Ga(2) atom to form distorted OSr2GaCu tetrahedra that share  a cornercorner with one O(5)Sr2GaCu tetrahedra,  a cornercorner with one O(7)Sr2YCu trigonal pyramid, and  a cornercorner with one O(11)Sr2YO trigonal pyramid. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(3), one Y(1), one Cu(4), and one Ga(1) atom. In the fifth O site, O(5) is bonded to one Sr(2), one Sr(4), one Cu(3), and one Ga(1) atom to form distorted OSr2GaCu tetrahedra that share  a cornercorner with one O(3)Sr2GaCu tetrahedra and  an edgeedge with one O(7)Sr2YCu trigonal pyramid. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sr(4), one Y(1), one Ga(1), and one Ga(2) atom. In the seventh O site, O(7) is bonded to one Sr(2), one Sr(4), one Y(1), and one Cu(2) atom to form distorted OSr2YCu trigonal pyramids that share  a cornercorner with one O(3)Sr2GaCu tetrahedra,  a cornercorner with one O(11)Sr2YO trigonal pyramid, and  an edgeedge with one O(5)Sr2GaCu tetrahedra. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Ca(1), one Cu(2), and one Cu(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sr(3), one Y(1), and one Ga(1) atom. In the tenth O site, O(10) is bonded in a distorted see-saw-like geometry to one Sr(3), one Ca(1), one Y(1), and one Ga(2) atom. In the eleventh O site, O(11) is bonded to one Sr(1), one Sr(3), one Y(1), and one O(13) atom to form distorted OSr2YO trigonal pyramids that share  a cornercorner with one O(3)Sr2GaCu tetrahedra and  a cornercorner with one O(7)Sr2YCu trigonal pyramid. The O(11)-O(13) bond length is 1.51 Å. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), one Ca(1), and one Cu(1) atom. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(3), one Sr(4), one Y(1), and one O(11) atom. In the fourteenth O site, O(14) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), one Ca(1), and one Cu(2) atom.