Na2Fe2C4SO16 crystallizes in the orthorhombic Fddd space group. Na(1) is bonded in a distorted hexagonal planar geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. Fe(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. S(1) is bonded in a tetrahedral geometry to four equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Fe(1), and one C(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and one C(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Fe(1), and one C(1) atom. In the fourth O site, O(4) is bonded in an L-shaped geometry to one Na(1) and one S(1) atom.
Na2Fe2C4SO16 crystallizes in the orthorhombic Fddd space group. Na(1) is bonded in a distorted hexagonal planar geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. Both Na(1)-O(1) bond lengths are 2.45 Å. Both Na(1)-O(3) bond lengths are 2.49 Å. Both Na(1)-O(4) bond lengths are 2.43 Å. Fe(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Fe(1)-O(1) bond lengths are 2.02 Å. Both Fe(1)-O(2) bond lengths are 2.00 Å. Both Fe(1)-O(3) bond lengths are 2.08 Å. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The C(1)-O(1) bond length is 1.30 Å. The C(1)-O(2) bond length is 1.29 Å. The C(1)-O(3) bond length is 1.29 Å. S(1) is bonded in a tetrahedral geometry to four equivalent O(4) atoms. All S(1)-O(4) bond lengths are 1.49 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Fe(1), and one C(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and one C(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Fe(1), and one C(1) atom. In the fourth O site, O(4) is bonded in an L-shaped geometry to one Na(1) and one S(1) atom.