Er6MnTe2 crystallizes in the hexagonal P-62m space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 5-coordinate geometry to one Mn(1) and four equivalent Te(1) atoms. In the second Er site, Er(2) is bonded to two equivalent Mn(1) and two equivalent Te(1) atoms to form a mixture of distorted corner and edge-sharing ErMn2Te2 tetrahedra. Mn(1) is bonded in a 9-coordinate geometry to three equivalent Er(1) and six equivalent Er(2) atoms. Te(1) is bonded in a 9-coordinate geometry to three equivalent Er(2) and six equivalent Er(1) atoms.
Er6MnTe2 crystallizes in the hexagonal P-62m space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 5-coordinate geometry to one Mn(1) and four equivalent Te(1) atoms. The Er(1)-Mn(1) bond length is 3.21 Å. All Er(1)-Te(1) bond lengths are 3.25 Å. In the second Er site, Er(2) is bonded to two equivalent Mn(1) and two equivalent Te(1) atoms to form a mixture of distorted corner and edge-sharing ErMn2Te2 tetrahedra. Both Er(2)-Mn(1) bond lengths are 2.84 Å. Both Er(2)-Te(1) bond lengths are 3.17 Å. Mn(1) is bonded in a 9-coordinate geometry to three equivalent Er(1) and six equivalent Er(2) atoms. Te(1) is bonded in a 9-coordinate geometry to three equivalent Er(2) and six equivalent Er(1) atoms.