Ba6Pr2Y(CuO2)12 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), one O(7), one O(8), and three equivalent O(5) atoms. Pr(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Y(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing CuO5 square pyramids. In the second Cu site, Cu(2) is bonded to one O(6), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing CuO5 square pyramids. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to one O(5), one O(8), and two equivalent O(7) atoms. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to one O(6), one O(8), and two equivalent O(7) atoms. There are eight inequivalent O sites. In the first O site, O(6) is bonded to two equivalent Ba(1), two equivalent Ba(2), one Cu(2), and one Cu(4) atom to form distorted OBa4Cu2 octahedra that share corners with two equivalent O(1)Ba2Pr2Cu2 octahedra, corners with two equivalent O(5)Ba4Cu2 octahedra, corners with two equivalent O(6)Ba4Cu2 octahedra, and edges with four equivalent O(5)Ba4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 11-58°. In the second O site, O(1) is bonded to two equivalent Ba(2), two equivalent Pr(1), and two equivalent Cu(1) atoms to form distorted OBa2Pr2Cu2 octahedra that share corners with two equivalent O(5)Ba4Cu2 octahedra, corners with two equivalent O(6)Ba4Cu2 octahedra,  an edgeedge with one O(1)Ba2Pr2Cu2 octahedra, and faces with two equivalent O(5)Ba4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 57-58°. In the third O site, O(2) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Pr(1), one Y(1), one Cu(1), and one Cu(2) atom. In the fourth O site, O(3) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Pr(1), one Y(1), one Cu(1), and one Cu(2) atom. In the fifth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Ba(2), two equivalent Pr(1), and two equivalent Cu(1) atoms. In the sixth O site, O(5) is bonded to one Ba(1), three equivalent Ba(2), one Cu(1), and one Cu(3) atom to form distorted OBa4Cu2 octahedra that share  a cornercorner with one O(1)Ba2Pr2Cu2 octahedra,  a cornercorner with one O(6)Ba4Cu2 octahedra, corners with three equivalent O(5)Ba4Cu2 octahedra, edges with two equivalent O(5)Ba4Cu2 octahedra, edges with two equivalent O(6)Ba4Cu2 octahedra, and  a faceface with one O(1)Ba2Pr2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 11-57°. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Ba(1), one Ba(2), one Cu(4), and two equivalent Cu(3) atoms. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to two equivalent Ba(2), one Cu(4), and two equivalent Cu(3) atoms.
Ba6Pr2Y(CuO2)12 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. Both Ba(1)-O(2) bond lengths are 2.94 Å. Both Ba(1)-O(3) bond lengths are 2.99 Å. Both Ba(1)-O(5) bond lengths are 2.78 Å. Both Ba(1)-O(6) bond lengths are 2.79 Å. Both Ba(1)-O(7) bond lengths are 3.05 Å. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), one O(7), one O(8), and three equivalent O(5) atoms. The Ba(2)-O(1) bond length is 2.95 Å. The Ba(2)-O(2) bond length is 3.03 Å. The Ba(2)-O(3) bond length is 3.08 Å. The Ba(2)-O(4) bond length is 2.99 Å. The Ba(2)-O(6) bond length is 2.79 Å. The Ba(2)-O(7) bond length is 3.02 Å. The Ba(2)-O(8) bond length is 3.02 Å. There is one shorter (2.78 Å) and two longer (2.79 Å) Ba(2)-O(5) bond lengths. Pr(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Pr(1)-O(1) bond lengths are 2.51 Å. Both Pr(1)-O(2) bond lengths are 2.49 Å. Both Pr(1)-O(3) bond lengths are 2.49 Å. Both Pr(1)-O(4) bond lengths are 2.50 Å. Y(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. All Y(1)-O(2) bond lengths are 2.43 Å. All Y(1)-O(3) bond lengths are 2.41 Å. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing CuO5 square pyramids. The Cu(1)-O(1) bond length is 1.98 Å. The Cu(1)-O(2) bond length is 1.97 Å. The Cu(1)-O(3) bond length is 1.97 Å. The Cu(1)-O(4) bond length is 1.97 Å. The Cu(1)-O(5) bond length is 2.31 Å. In the second Cu site, Cu(2) is bonded to one O(6), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing CuO5 square pyramids. The Cu(2)-O(6) bond length is 2.32 Å. Both Cu(2)-O(2) bond lengths are 1.99 Å. Both Cu(2)-O(3) bond lengths are 1.97 Å. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to one O(5), one O(8), and two equivalent O(7) atoms. The Cu(3)-O(5) bond length is 1.84 Å. The Cu(3)-O(8) bond length is 1.96 Å. There is one shorter (1.89 Å) and one longer (1.96 Å) Cu(3)-O(7) bond length. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to one O(6), one O(8), and two equivalent O(7) atoms. The Cu(4)-O(6) bond length is 1.85 Å. The Cu(4)-O(8) bond length is 1.89 Å. Both Cu(4)-O(7) bond lengths are 1.96 Å. There are eight inequivalent O sites. In the first O site, O(6) is bonded to two equivalent Ba(1), two equivalent Ba(2), one Cu(2), and one Cu(4) atom to form distorted OBa4Cu2 octahedra that share corners with two equivalent O(1)Ba2Pr2Cu2 octahedra, corners with two equivalent O(5)Ba4Cu2 octahedra, corners with two equivalent O(6)Ba4Cu2 octahedra, and edges with four equivalent O(5)Ba4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 11-58°. In the second O site, O(1) is bonded to two equivalent Ba(2), two equivalent Pr(1), and two equivalent Cu(1) atoms to form distorted OBa2Pr2Cu2 octahedra that share corners with two equivalent O(5)Ba4Cu2 octahedra, corners with two equivalent O(6)Ba4Cu2 octahedra,  an edgeedge with one O(1)Ba2Pr2Cu2 octahedra, and faces with two equivalent O(5)Ba4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 57-58°. In the third O site, O(2) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Pr(1), one Y(1), one Cu(1), and one Cu(2) atom. In the fourth O site, O(3) is bonded in a 6-coordinate geometry to one Ba(1), one Ba(2), one Pr(1), one Y(1), one Cu(1), and one Cu(2) atom. In the fifth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Ba(2), two equivalent Pr(1), and two equivalent Cu(1) atoms. In the sixth O site, O(5) is bonded to one Ba(1), three equivalent Ba(2), one Cu(1), and one Cu(3) atom to form distorted OBa4Cu2 octahedra that share  a cornercorner with one O(1)Ba2Pr2Cu2 octahedra,  a cornercorner with one O(6)Ba4Cu2 octahedra, corners with three equivalent O(5)Ba4Cu2 octahedra, edges with two equivalent O(5)Ba4Cu2 octahedra, edges with two equivalent O(6)Ba4Cu2 octahedra, and  a faceface with one O(1)Ba2Pr2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 11-57°. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Ba(1), one Ba(2), one Cu(4), and two equivalent Cu(3) atoms. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to two equivalent Ba(2), one Cu(4), and two equivalent Cu(3) atoms.