SrNd3CuAlO8 is (La,Ba)CuO4-derived structured and crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(5) atoms. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(3), two equivalent O(4), and four equivalent O(5) atoms. In the second Nd site, Nd(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), and four equivalent O(5) atoms. In the third Nd site, Nd(3) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and four equivalent O(5) atoms. Cu(1) is bonded to one O(1), one O(4), and four equivalent O(5) atoms to form CuO6 octahedra that share corners with four equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles are 4°. Al(1) is bonded to one O(2), one O(3), and four equivalent O(5) atoms to form AlO6 octahedra that share corners with four equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 4°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Nd(1), two equivalent Nd(2), two equivalent Nd(3), and one Cu(1) atom. In the second O site, O(2) is bonded to one Sr(1), two equivalent Nd(2), two equivalent Nd(3), and one Al(1) atom to form distorted OSrNd4Al octahedra that share  a cornercorner with one O(3)Sr2Nd3Al octahedra, corners with four equivalent O(2)SrNd4Al octahedra, corners with twelve equivalent O(5)SrNd3AlCu octahedra, edges with two equivalent O(3)Sr2Nd3Al octahedra, edges with two equivalent O(4)Sr2Nd3Cu octahedra, and faces with four equivalent O(5)SrNd3AlCu octahedra. The corner-sharing octahedral tilt angles range from 0-53°. In the third O site, O(3) is bonded to two equivalent Sr(1), one Nd(3), two equivalent Nd(1), and one Al(1) atom to form distorted OSr2Nd3Al octahedra that share  a cornercorner with one O(2)SrNd4Al octahedra, corners with four equivalent O(3)Sr2Nd3Al octahedra, corners with twelve equivalent O(5)SrNd3AlCu octahedra, edges with two equivalent O(2)SrNd4Al octahedra, edges with four equivalent O(4)Sr2Nd3Cu octahedra, and faces with four equivalent O(5)SrNd3AlCu octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the fourth O site, O(4) is bonded to two equivalent Sr(1), one Nd(2), two equivalent Nd(1), and one Cu(1) atom to form distorted OSr2Nd3Cu octahedra that share corners with four equivalent O(4)Sr2Nd3Cu octahedra, corners with twelve equivalent O(5)SrNd3AlCu octahedra, edges with two equivalent O(2)SrNd4Al octahedra, edges with four equivalent O(3)Sr2Nd3Al octahedra, and faces with four equivalent O(5)SrNd3AlCu octahedra. The corner-sharing octahedral tilt angles range from 22-52°. In the fifth O site, O(5) is bonded to one Sr(1), one Nd(1), one Nd(2), one Nd(3), one Cu(1), and one Al(1) atom to form distorted OSrNd3AlCu octahedra that share corners with two equivalent O(5)SrNd3AlCu octahedra, corners with three equivalent O(3)Sr2Nd3Al octahedra, corners with three equivalent O(4)Sr2Nd3Cu octahedra, corners with three equivalent O(2)SrNd4Al octahedra, edges with two equivalent O(5)SrNd3AlCu octahedra,  a faceface with one O(3)Sr2Nd3Al octahedra,  a faceface with one O(4)Sr2Nd3Cu octahedra,  a faceface with one O(2)SrNd4Al octahedra, and faces with four equivalent O(5)SrNd3AlCu octahedra. The corner-sharing octahedral tilt angles range from 1-54°.
SrNd3CuAlO8 is (La,Ba)CuO4-derived structured and crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(5) atoms. The Sr(1)-O(2) bond length is 2.51 Å. Both Sr(1)-O(3) bond lengths are 2.68 Å. Both Sr(1)-O(4) bond lengths are 2.71 Å. All Sr(1)-O(5) bond lengths are 2.69 Å. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(3), two equivalent O(4), and four equivalent O(5) atoms. The Nd(1)-O(1) bond length is 2.27 Å. Both Nd(1)-O(3) bond lengths are 2.69 Å. Both Nd(1)-O(4) bond lengths are 2.73 Å. All Nd(1)-O(5) bond lengths are 2.60 Å. In the second Nd site, Nd(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), and four equivalent O(5) atoms. The Nd(2)-O(4) bond length is 2.26 Å. Both Nd(2)-O(1) bond lengths are 2.73 Å. Both Nd(2)-O(2) bond lengths are 2.67 Å. All Nd(2)-O(5) bond lengths are 2.54 Å. In the third Nd site, Nd(3) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), and four equivalent O(5) atoms. The Nd(3)-O(3) bond length is 2.46 Å. Both Nd(3)-O(1) bond lengths are 2.73 Å. Both Nd(3)-O(2) bond lengths are 2.68 Å. All Nd(3)-O(5) bond lengths are 2.56 Å. Cu(1) is bonded to one O(1), one O(4), and four equivalent O(5) atoms to form CuO6 octahedra that share corners with four equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles are 4°. The Cu(1)-O(1) bond length is 2.42 Å. The Cu(1)-O(4) bond length is 2.30 Å. All Cu(1)-O(5) bond lengths are 1.93 Å. Al(1) is bonded to one O(2), one O(3), and four equivalent O(5) atoms to form AlO6 octahedra that share corners with four equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 4°. The Al(1)-O(2) bond length is 2.01 Å. The Al(1)-O(3) bond length is 2.20 Å. All Al(1)-O(5) bond lengths are 1.84 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Nd(1), two equivalent Nd(2), two equivalent Nd(3), and one Cu(1) atom. In the second O site, O(2) is bonded to one Sr(1), two equivalent Nd(2), two equivalent Nd(3), and one Al(1) atom to form distorted OSrNd4Al octahedra that share  a cornercorner with one O(3)Sr2Nd3Al octahedra, corners with four equivalent O(2)SrNd4Al octahedra, corners with twelve equivalent O(5)SrNd3AlCu octahedra, edges with two equivalent O(3)Sr2Nd3Al octahedra, edges with two equivalent O(4)Sr2Nd3Cu octahedra, and faces with four equivalent O(5)SrNd3AlCu octahedra. The corner-sharing octahedral tilt angles range from 0-53°. In the third O site, O(3) is bonded to two equivalent Sr(1), one Nd(3), two equivalent Nd(1), and one Al(1) atom to form distorted OSr2Nd3Al octahedra that share  a cornercorner with one O(2)SrNd4Al octahedra, corners with four equivalent O(3)Sr2Nd3Al octahedra, corners with twelve equivalent O(5)SrNd3AlCu octahedra, edges with two equivalent O(2)SrNd4Al octahedra, edges with four equivalent O(4)Sr2Nd3Cu octahedra, and faces with four equivalent O(5)SrNd3AlCu octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the fourth O site, O(4) is bonded to two equivalent Sr(1), one Nd(2), two equivalent Nd(1), and one Cu(1) atom to form distorted OSr2Nd3Cu octahedra that share corners with four equivalent O(4)Sr2Nd3Cu octahedra, corners with twelve equivalent O(5)SrNd3AlCu octahedra, edges with two equivalent O(2)SrNd4Al octahedra, edges with four equivalent O(3)Sr2Nd3Al octahedra, and faces with four equivalent O(5)SrNd3AlCu octahedra. The corner-sharing octahedral tilt angles range from 22-52°. In the fifth O site, O(5) is bonded to one Sr(1), one Nd(1), one Nd(2), one Nd(3), one Cu(1), and one Al(1) atom to form distorted OSrNd3AlCu octahedra that share corners with two equivalent O(5)SrNd3AlCu octahedra, corners with three equivalent O(3)Sr2Nd3Al octahedra, corners with three equivalent O(4)Sr2Nd3Cu octahedra, corners with three equivalent O(2)SrNd4Al octahedra, edges with two equivalent O(5)SrNd3AlCu octahedra,  a faceface with one O(3)Sr2Nd3Al octahedra,  a faceface with one O(4)Sr2Nd3Cu octahedra,  a faceface with one O(2)SrNd4Al octahedra, and faces with four equivalent O(5)SrNd3AlCu octahedra. The corner-sharing octahedral tilt angles range from 1-54°.