Ba2La4PtCuO10 crystallizes in the orthorhombic Cmmm space group. Ba(1) is bonded in a distorted q6 geometry to two equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. In the second La site, La(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Pt(1) is bonded in a square co-planar geometry to four equivalent O(3) atoms. Cu(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1), two equivalent La(1), and two equivalent La(2) atoms to form OBa2La4 octahedra that share corners with six equivalent O(1)Ba2La4 octahedra, corners with eight equivalent O(2)Ba2La3Cu octahedra, corners with eight equivalent O(3)Ba2La3Pt octahedra, faces with four equivalent O(2)Ba2La3Cu octahedra, and faces with four equivalent O(3)Ba2La3Pt octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the second O site, O(2) is bonded to two equivalent Ba(1), one La(1), two equivalent La(2), and one Cu(1) atom to form distorted OBa2La3Cu octahedra that share corners with four equivalent O(1)Ba2La4 octahedra, corners with five equivalent O(2)Ba2La3Cu octahedra, corners with eight equivalent O(3)Ba2La3Pt octahedra,  an edgeedge with one O(2)Ba2La3Cu octahedra, edges with four equivalent O(3)Ba2La3Pt octahedra, faces with two equivalent O(1)Ba2La4 octahedra, and faces with three equivalent O(2)Ba2La3Cu octahedra. The corner-sharing octahedral tilt angles range from 0-78°. In the third O site, O(3) is bonded to two equivalent Ba(1), one La(2), two equivalent La(1), and one Pt(1) atom to form distorted OBa2La3Pt octahedra that share corners with four equivalent O(1)Ba2La4 octahedra, corners with five equivalent O(3)Ba2La3Pt octahedra, corners with eight equivalent O(2)Ba2La3Cu octahedra,  an edgeedge with one O(3)Ba2La3Pt octahedra, edges with four equivalent O(2)Ba2La3Cu octahedra, faces with two equivalent O(1)Ba2La4 octahedra, and faces with three equivalent O(3)Ba2La3Pt octahedra. The corner-sharing octahedral tilt angles range from 0-78°.
Ba2La4PtCuO10 crystallizes in the orthorhombic Cmmm space group. Ba(1) is bonded in a distorted q6 geometry to two equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms. Both Ba(1)-O(1) bond lengths are 2.98 Å. All Ba(1)-O(2) bond lengths are 3.04 Å. All Ba(1)-O(3) bond lengths are 3.05 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Both La(1)-O(1) bond lengths are 2.54 Å. Both La(1)-O(2) bond lengths are 2.37 Å. All La(1)-O(3) bond lengths are 2.69 Å. In the second La site, La(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Both La(2)-O(1) bond lengths are 2.56 Å. Both La(2)-O(3) bond lengths are 2.34 Å. All La(2)-O(2) bond lengths are 2.66 Å. Pt(1) is bonded in a square co-planar geometry to four equivalent O(3) atoms. All Pt(1)-O(3) bond lengths are 2.03 Å. Cu(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. All Cu(1)-O(2) bond lengths are 1.97 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1), two equivalent La(1), and two equivalent La(2) atoms to form OBa2La4 octahedra that share corners with six equivalent O(1)Ba2La4 octahedra, corners with eight equivalent O(2)Ba2La3Cu octahedra, corners with eight equivalent O(3)Ba2La3Pt octahedra, faces with four equivalent O(2)Ba2La3Cu octahedra, and faces with four equivalent O(3)Ba2La3Pt octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the second O site, O(2) is bonded to two equivalent Ba(1), one La(1), two equivalent La(2), and one Cu(1) atom to form distorted OBa2La3Cu octahedra that share corners with four equivalent O(1)Ba2La4 octahedra, corners with five equivalent O(2)Ba2La3Cu octahedra, corners with eight equivalent O(3)Ba2La3Pt octahedra,  an edgeedge with one O(2)Ba2La3Cu octahedra, edges with four equivalent O(3)Ba2La3Pt octahedra, faces with two equivalent O(1)Ba2La4 octahedra, and faces with three equivalent O(2)Ba2La3Cu octahedra. The corner-sharing octahedral tilt angles range from 0-78°. In the third O site, O(3) is bonded to two equivalent Ba(1), one La(2), two equivalent La(1), and one Pt(1) atom to form distorted OBa2La3Pt octahedra that share corners with four equivalent O(1)Ba2La4 octahedra, corners with five equivalent O(3)Ba2La3Pt octahedra, corners with eight equivalent O(2)Ba2La3Cu octahedra,  an edgeedge with one O(3)Ba2La3Pt octahedra, edges with four equivalent O(2)Ba2La3Cu octahedra, faces with two equivalent O(1)Ba2La4 octahedra, and faces with three equivalent O(3)Ba2La3Pt octahedra. The corner-sharing octahedral tilt angles range from 0-78°.