Sr3Y2FeCu3BiO12 crystallizes in the orthorhombic Amm2 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(2) atoms. In the third Sr site, Sr(3) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(5), two equivalent O(6), and four equivalent O(2) atoms. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the second Y site, Y(2) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. Fe(1) is bonded to one O(5) and four equivalent O(2) atoms to form distorted FeO5 trigonal bipyramids that share corners with four equivalent Cu(3)O5 square pyramids. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(4) and four equivalent O(1) atoms to form CuO5 square pyramids that share corners with two equivalent Bi(1)O5 square pyramids and corners with four equivalent Cu(2)O5 square pyramids. In the second Cu site, Cu(2) is bonded to one O(3) and four equivalent O(1) atoms to form CuO5 square pyramids that share corners with two equivalent Bi(1)O5 square pyramids and corners with four equivalent Cu(1)O5 square pyramids. In the third Cu site, Cu(3) is bonded to one O(6) and four equivalent O(2) atoms to form CuO5 square pyramids that share  a cornercorner with one Bi(1)O5 square pyramid and corners with four equivalent Fe(1)O5 trigonal bipyramids. Bi(1) is bonded to one O(6), two equivalent O(3), and two equivalent O(4) atoms to form distorted BiO5 square pyramids that share  a cornercorner with one Cu(3)O5 square pyramid, corners with two equivalent Cu(1)O5 square pyramids, corners with two equivalent Cu(2)O5 square pyramids, and corners with four equivalent Bi(1)O5 square pyramids. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Sr(1), one Y(1), one Y(2), one Cu(1), and one Cu(2) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(3), one Y(1), one Y(2), one Fe(1), and one Cu(3) atom. In the third O site, O(3) is bonded to one Sr(3), two equivalent Sr(1), one Cu(2), and two equivalent Bi(1) atoms to form distorted OSr3CuBi2 octahedra that share corners with four equivalent O(3)Sr3CuBi2 octahedra, edges with two equivalent O(6)Sr4CuBi octahedra, edges with two equivalent O(5)Sr5Fe octahedra, and edges with four equivalent O(4)Sr3CuBi2 octahedra. The corner-sharing octahedral tilt angles range from 9-18°. In the fourth O site, O(4) is bonded to one Sr(2), two equivalent Sr(1), one Cu(1), and two equivalent Bi(1) atoms to form distorted OSr3CuBi2 octahedra that share corners with four equivalent O(4)Sr3CuBi2 octahedra, edges with two equivalent O(6)Sr4CuBi octahedra, edges with two equivalent O(5)Sr5Fe octahedra, and edges with four equivalent O(3)Sr3CuBi2 octahedra. The corner-sharing octahedral tilt angles range from 9-18°. In the fifth O site, O(5) is bonded to one Sr(1), two equivalent Sr(2), two equivalent Sr(3), and one Fe(1) atom to form distorted OSr5Fe octahedra that share corners with four equivalent O(5)Sr5Fe octahedra, edges with two equivalent O(3)Sr3CuBi2 octahedra, edges with two equivalent O(4)Sr3CuBi2 octahedra, and edges with four equivalent O(6)Sr4CuBi octahedra. The corner-sharing octahedral tilt angles are 10°. In the sixth O site, O(6) is bonded to two equivalent Sr(2), two equivalent Sr(3), one Cu(3), and one Bi(1) atom to form distorted OSr4CuBi octahedra that share corners with four equivalent O(6)Sr4CuBi octahedra, edges with two equivalent O(3)Sr3CuBi2 octahedra, edges with two equivalent O(4)Sr3CuBi2 octahedra, and edges with four equivalent O(5)Sr5Fe octahedra. The corner-sharing octahedral tilt angles are 21°.
Sr3Y2FeCu3BiO12 crystallizes in the orthorhombic Amm2 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. The Sr(1)-O(5) bond length is 2.60 Å. Both Sr(1)-O(3) bond lengths are 2.74 Å. Both Sr(1)-O(4) bond lengths are 2.74 Å. All Sr(1)-O(1) bond lengths are 2.86 Å. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(2) atoms. The Sr(2)-O(4) bond length is 2.42 Å. Both Sr(2)-O(5) bond lengths are 2.72 Å. Both Sr(2)-O(6) bond lengths are 2.75 Å. All Sr(2)-O(2) bond lengths are 2.87 Å. In the third Sr site, Sr(3) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(5), two equivalent O(6), and four equivalent O(2) atoms. The Sr(3)-O(3) bond length is 2.42 Å. Both Sr(3)-O(5) bond lengths are 2.72 Å. Both Sr(3)-O(6) bond lengths are 2.75 Å. All Sr(3)-O(2) bond lengths are 2.86 Å. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. All Y(1)-O(1) bond lengths are 2.36 Å. All Y(1)-O(2) bond lengths are 2.46 Å. In the second Y site, Y(2) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. All Y(2)-O(1) bond lengths are 2.36 Å. All Y(2)-O(2) bond lengths are 2.43 Å. Fe(1) is bonded to one O(5) and four equivalent O(2) atoms to form distorted FeO5 trigonal bipyramids that share corners with four equivalent Cu(3)O5 square pyramids. The Fe(1)-O(5) bond length is 1.92 Å. All Fe(1)-O(2) bond lengths are 1.95 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(4) and four equivalent O(1) atoms to form CuO5 square pyramids that share corners with two equivalent Bi(1)O5 square pyramids and corners with four equivalent Cu(2)O5 square pyramids. The Cu(1)-O(4) bond length is 2.25 Å. All Cu(1)-O(1) bond lengths are 1.94 Å. In the second Cu site, Cu(2) is bonded to one O(3) and four equivalent O(1) atoms to form CuO5 square pyramids that share corners with two equivalent Bi(1)O5 square pyramids and corners with four equivalent Cu(1)O5 square pyramids. The Cu(2)-O(3) bond length is 2.26 Å. All Cu(2)-O(1) bond lengths are 1.94 Å. In the third Cu site, Cu(3) is bonded to one O(6) and four equivalent O(2) atoms to form CuO5 square pyramids that share  a cornercorner with one Bi(1)O5 square pyramid and corners with four equivalent Fe(1)O5 trigonal bipyramids. The Cu(3)-O(6) bond length is 2.47 Å. All Cu(3)-O(2) bond lengths are 1.94 Å. Bi(1) is bonded to one O(6), two equivalent O(3), and two equivalent O(4) atoms to form distorted BiO5 square pyramids that share  a cornercorner with one Cu(3)O5 square pyramid, corners with two equivalent Cu(1)O5 square pyramids, corners with two equivalent Cu(2)O5 square pyramids, and corners with four equivalent Bi(1)O5 square pyramids. The Bi(1)-O(6) bond length is 2.13 Å. Both Bi(1)-O(3) bond lengths are 2.72 Å. Both Bi(1)-O(4) bond lengths are 2.72 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Sr(1), one Y(1), one Y(2), one Cu(1), and one Cu(2) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Sr(2), one Sr(3), one Y(1), one Y(2), one Fe(1), and one Cu(3) atom. In the third O site, O(3) is bonded to one Sr(3), two equivalent Sr(1), one Cu(2), and two equivalent Bi(1) atoms to form distorted OSr3CuBi2 octahedra that share corners with four equivalent O(3)Sr3CuBi2 octahedra, edges with two equivalent O(6)Sr4CuBi octahedra, edges with two equivalent O(5)Sr5Fe octahedra, and edges with four equivalent O(4)Sr3CuBi2 octahedra. The corner-sharing octahedral tilt angles range from 9-18°. In the fourth O site, O(4) is bonded to one Sr(2), two equivalent Sr(1), one Cu(1), and two equivalent Bi(1) atoms to form distorted OSr3CuBi2 octahedra that share corners with four equivalent O(4)Sr3CuBi2 octahedra, edges with two equivalent O(6)Sr4CuBi octahedra, edges with two equivalent O(5)Sr5Fe octahedra, and edges with four equivalent O(3)Sr3CuBi2 octahedra. The corner-sharing octahedral tilt angles range from 9-18°. In the fifth O site, O(5) is bonded to one Sr(1), two equivalent Sr(2), two equivalent Sr(3), and one Fe(1) atom to form distorted OSr5Fe octahedra that share corners with four equivalent O(5)Sr5Fe octahedra, edges with two equivalent O(3)Sr3CuBi2 octahedra, edges with two equivalent O(4)Sr3CuBi2 octahedra, and edges with four equivalent O(6)Sr4CuBi octahedra. The corner-sharing octahedral tilt angles are 10°. In the sixth O site, O(6) is bonded to two equivalent Sr(2), two equivalent Sr(3), one Cu(3), and one Bi(1) atom to form distorted OSr4CuBi octahedra that share corners with four equivalent O(6)Sr4CuBi octahedra, edges with two equivalent O(3)Sr3CuBi2 octahedra, edges with two equivalent O(4)Sr3CuBi2 octahedra, and edges with four equivalent O(5)Sr5Fe octahedra. The corner-sharing octahedral tilt angles are 21°.