ErMn2O3 crystallizes in the orthorhombic Pbam space group. Er(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form distorted edge-sharing ErO6 pentagonal pyramids. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a linear geometry to two equivalent O(1) atoms. In the second Mn site, Mn(2) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Er(1), one Mn(1), and one Mn(2) atom to form a mixture of distorted edge and corner-sharing OEr2Mn2 tetrahedra. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Er(1) and two equivalent Mn(2) atoms.
ErMn2O3 crystallizes in the orthorhombic Pbam space group. Er(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form distorted edge-sharing ErO6 pentagonal pyramids. Both Er(1)-O(2) bond lengths are 2.24 Å. There are two shorter (2.30 Å) and two longer (2.32 Å) Er(1)-O(1) bond lengths. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a linear geometry to two equivalent O(1) atoms. Both Mn(1)-O(1) bond lengths are 1.95 Å. In the second Mn site, Mn(2) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Mn(2)-O(1) bond lengths are 2.13 Å. Both Mn(2)-O(2) bond lengths are 2.18 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Er(1), one Mn(1), and one Mn(2) atom to form a mixture of distorted edge and corner-sharing OEr2Mn2 tetrahedra. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Er(1) and two equivalent Mn(2) atoms.