Sr2Ca2Ga(CuO3)3 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(2), two equivalent O(5), and four equivalent O(1) atoms. Ca(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(5), and four equivalent O(3) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to four equivalent O(3) atoms. In the second Cu site, Cu(2) is bonded to one O(1), two equivalent O(2), and two equivalent O(5) atoms to form CuO5 square pyramids that share corners with four equivalent Cu(2)O5 square pyramids and  a cornercorner with one Ga(1)O4 tetrahedra. Ga(1) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form GaO4 tetrahedra that share corners with two equivalent Cu(2)O5 square pyramids and corners with two equivalent Ga(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Sr(1), one Cu(2), and one Ga(1) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Ca(1), and two equivalent Cu(2) atoms to form distorted OSr2Ca2Cu2 octahedra that share corners with two equivalent O(5)Sr2Ca2Cu2 octahedra, corners with six equivalent O(3)Ca4Cu2 octahedra, corners with two equivalent O(4)Sr2Ga2 tetrahedra,  an edgeedge with one O(3)Ca4Cu2 octahedra, edges with two equivalent O(5)Sr2Ca2Cu2 octahedra, faces with two equivalent O(2)Sr2Ca2Cu2 octahedra, and faces with two equivalent O(5)Sr2Ca2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 3-67°. In the third O site, O(3) is bonded to four equivalent Ca(1) and two equivalent Cu(1) atoms to form OCa4Cu2 octahedra that share corners with two equivalent O(3)Ca4Cu2 octahedra, corners with six equivalent O(2)Sr2Ca2Cu2 octahedra, corners with six equivalent O(5)Sr2Ca2Cu2 octahedra,  an edgeedge with one O(2)Sr2Ca2Cu2 octahedra,  an edgeedge with one O(5)Sr2Ca2Cu2 octahedra, edges with two equivalent O(3)Ca4Cu2 octahedra, and faces with four equivalent O(3)Ca4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the fourth O site, O(4) is bonded to two equivalent Sr(1) and two equivalent Ga(1) atoms to form distorted OSr2Ga2 tetrahedra that share corners with four equivalent O(2)Sr2Ca2Cu2 octahedra, corners with four equivalent O(5)Sr2Ca2Cu2 octahedra, and corners with two equivalent O(4)Sr2Ga2 tetrahedra. The corner-sharing octahedral tilt angles range from 22-68°. In the fifth O site, O(5) is bonded to two equivalent Sr(1), two equivalent Ca(1), and two equivalent Cu(2) atoms to form distorted OSr2Ca2Cu2 octahedra that share corners with two equivalent O(2)Sr2Ca2Cu2 octahedra, corners with six equivalent O(3)Ca4Cu2 octahedra, corners with two equivalent O(4)Sr2Ga2 tetrahedra,  an edgeedge with one O(3)Ca4Cu2 octahedra, edges with two equivalent O(2)Sr2Ca2Cu2 octahedra, faces with two equivalent O(2)Sr2Ca2Cu2 octahedra, and faces with two equivalent O(5)Sr2Ca2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 2-66°.
Sr2Ca2Ga(CuO3)3 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(2), two equivalent O(5), and four equivalent O(1) atoms. The Sr(1)-O(4) bond length is 2.48 Å. Both Sr(1)-O(2) bond lengths are 2.74 Å. There is one shorter (2.74 Å) and one longer (2.77 Å) Sr(1)-O(5) bond length. There are a spread of Sr(1)-O(1) bond distances ranging from 2.50-3.12 Å. Ca(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(5), and four equivalent O(3) atoms. There is one shorter (2.41 Å) and one longer (2.44 Å) Ca(1)-O(2) bond length. There is one shorter (2.47 Å) and one longer (2.48 Å) Ca(1)-O(5) bond length. There are a spread of Ca(1)-O(3) bond distances ranging from 2.52-2.57 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to four equivalent O(3) atoms. There are two shorter (1.92 Å) and two longer (1.93 Å) Cu(1)-O(3) bond lengths. In the second Cu site, Cu(2) is bonded to one O(1), two equivalent O(2), and two equivalent O(5) atoms to form CuO5 square pyramids that share corners with four equivalent Cu(2)O5 square pyramids and  a cornercorner with one Ga(1)O4 tetrahedra. The Cu(2)-O(1) bond length is 2.37 Å. Both Cu(2)-O(2) bond lengths are 1.94 Å. There is one shorter (1.92 Å) and one longer (1.93 Å) Cu(2)-O(5) bond length. Ga(1) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form GaO4 tetrahedra that share corners with two equivalent Cu(2)O5 square pyramids and corners with two equivalent Ga(1)O4 tetrahedra. Both Ga(1)-O(1) bond lengths are 1.85 Å. There is one shorter (1.90 Å) and one longer (1.91 Å) Ga(1)-O(4) bond length. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Sr(1), one Cu(2), and one Ga(1) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Ca(1), and two equivalent Cu(2) atoms to form distorted OSr2Ca2Cu2 octahedra that share corners with two equivalent O(5)Sr2Ca2Cu2 octahedra, corners with six equivalent O(3)Ca4Cu2 octahedra, corners with two equivalent O(4)Sr2Ga2 tetrahedra,  an edgeedge with one O(3)Ca4Cu2 octahedra, edges with two equivalent O(5)Sr2Ca2Cu2 octahedra, faces with two equivalent O(2)Sr2Ca2Cu2 octahedra, and faces with two equivalent O(5)Sr2Ca2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 3-67°. In the third O site, O(3) is bonded to four equivalent Ca(1) and two equivalent Cu(1) atoms to form OCa4Cu2 octahedra that share corners with two equivalent O(3)Ca4Cu2 octahedra, corners with six equivalent O(2)Sr2Ca2Cu2 octahedra, corners with six equivalent O(5)Sr2Ca2Cu2 octahedra,  an edgeedge with one O(2)Sr2Ca2Cu2 octahedra,  an edgeedge with one O(5)Sr2Ca2Cu2 octahedra, edges with two equivalent O(3)Ca4Cu2 octahedra, and faces with four equivalent O(3)Ca4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the fourth O site, O(4) is bonded to two equivalent Sr(1) and two equivalent Ga(1) atoms to form distorted OSr2Ga2 tetrahedra that share corners with four equivalent O(2)Sr2Ca2Cu2 octahedra, corners with four equivalent O(5)Sr2Ca2Cu2 octahedra, and corners with two equivalent O(4)Sr2Ga2 tetrahedra. The corner-sharing octahedral tilt angles range from 22-68°. In the fifth O site, O(5) is bonded to two equivalent Sr(1), two equivalent Ca(1), and two equivalent Cu(2) atoms to form distorted OSr2Ca2Cu2 octahedra that share corners with two equivalent O(2)Sr2Ca2Cu2 octahedra, corners with six equivalent O(3)Ca4Cu2 octahedra, corners with two equivalent O(4)Sr2Ga2 tetrahedra,  an edgeedge with one O(3)Ca4Cu2 octahedra, edges with two equivalent O(2)Sr2Ca2Cu2 octahedra, faces with two equivalent O(2)Sr2Ca2Cu2 octahedra, and faces with two equivalent O(5)Sr2Ca2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 2-66°.