Er2BiO2 crystallizes in the tetragonal I4/mmm space group. Er(1) is bonded in a 4-coordinate geometry to four equivalent Bi(1) and four equivalent O(1) atoms. Bi(1) is bonded in a body-centered cubic geometry to eight equivalent Er(1) atoms. O(1) is bonded to four equivalent Er(1) atoms to form a mixture of corner and edge-sharing OEr4 tetrahedra.
Er2BiO2 crystallizes in the tetragonal I4/mmm space group. Er(1) is bonded in a 4-coordinate geometry to four equivalent Bi(1) and four equivalent O(1) atoms. All Er(1)-Bi(1) bond lengths are 3.52 Å. All Er(1)-O(1) bond lengths are 2.19 Å. Bi(1) is bonded in a body-centered cubic geometry to eight equivalent Er(1) atoms. O(1) is bonded to four equivalent Er(1) atoms to form a mixture of corner and edge-sharing OEr4 tetrahedra.