NaBa4MgCu(CO5)2 crystallizes in the tetragonal I-4 space group. Na(1) is bonded to four equivalent O(3) atoms to form distorted NaO4 trigonal pyramids that share corners with four equivalent Cu(1)O4 trigonal pyramids. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(3) atoms. In the second Ba site, Ba(2) is bonded in a 2-coordinate geometry to two equivalent O(3) atoms. Mg(1) is bonded in a tetrahedral geometry to four equivalent O(1) atoms. Cu(1) is bonded to four equivalent O(3) atoms to form distorted CuO4 trigonal pyramids that share corners with four equivalent Na(1)O4 trigonal pyramids. C(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Mg(1), and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(1) atom. In the third O site, O(3) is bonded to one Na(1), one Ba(2), two equivalent Ba(1), and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OBa3NaCu trigonal bipyramids.
NaBa4MgCu(CO5)2 crystallizes in the tetragonal I-4 space group. Na(1) is bonded to four equivalent O(3) atoms to form distorted NaO4 trigonal pyramids that share corners with four equivalent Cu(1)O4 trigonal pyramids. All Na(1)-O(3) bond lengths are 2.30 Å. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(3) atoms. Both Ba(1)-O(1) bond lengths are 3.22 Å. All Ba(1)-O(3) bond lengths are 2.58 Å. In the second Ba site, Ba(2) is bonded in a 2-coordinate geometry to two equivalent O(3) atoms. Both Ba(2)-O(3) bond lengths are 2.42 Å. Mg(1) is bonded in a tetrahedral geometry to four equivalent O(1) atoms. All Mg(1)-O(1) bond lengths are 2.03 Å. Cu(1) is bonded to four equivalent O(3) atoms to form distorted CuO4 trigonal pyramids that share corners with four equivalent Na(1)O4 trigonal pyramids. All Cu(1)-O(3) bond lengths are 2.16 Å. C(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. The C(1)-O(2) bond length is 1.28 Å. Both C(1)-O(1) bond lengths are 1.32 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Mg(1), and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(1) atom. In the third O site, O(3) is bonded to one Na(1), one Ba(2), two equivalent Ba(1), and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OBa3NaCu trigonal bipyramids.