NaEu(Fe2O5)2O2 crystallizes in the orthorhombic Amm2 space group. The structure consists of four water atoms inside a NaEu(Fe2O5)2 framework. In the NaEu(Fe2O5)2 framework, Na(1) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(5) atoms. Eu(1) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. Fe(1) is bonded to one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form distorted corner-sharing FeO5 square pyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Eu(1) and two equivalent Fe(1) atoms. In the second O site, O(3) is bonded in a distorted T-shaped geometry to one Na(1) and two equivalent Fe(1) atoms. In the third O site, O(4) is bonded in a linear geometry to two equivalent Fe(1) atoms. In the fourth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Na(1) and two equivalent Fe(1) atoms.
NaEu(Fe2O5)2O2 crystallizes in the orthorhombic Amm2 space group. The structure consists of four water atoms inside a NaEu(Fe2O5)2 framework. In the NaEu(Fe2O5)2 framework, Na(1) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(5) atoms. Both Na(1)-O(3) bond lengths are 2.89 Å. Both Na(1)-O(5) bond lengths are 3.04 Å. Eu(1) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. All Eu(1)-O(1) bond lengths are 3.18 Å. Fe(1) is bonded to one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form distorted corner-sharing FeO5 square pyramids. The Fe(1)-O(3) bond length is 2.11 Å. The Fe(1)-O(4) bond length is 2.62 Å. The Fe(1)-O(5) bond length is 2.48 Å. There is one shorter (2.51 Å) and one longer (2.69 Å) Fe(1)-O(1) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Eu(1) and two equivalent Fe(1) atoms. In the second O site, O(3) is bonded in a distorted T-shaped geometry to one Na(1) and two equivalent Fe(1) atoms. In the third O site, O(4) is bonded in a linear geometry to two equivalent Fe(1) atoms. In the fourth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Na(1) and two equivalent Fe(1) atoms.