ErCd3 crystallizes in the orthorhombic Cmcm space group. Er(1) is bonded in a 10-coordinate geometry to four equivalent Cd(2) and eight equivalent Cd(1) atoms. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 11-coordinate geometry to four equivalent Er(1), three equivalent Cd(1), and four equivalent Cd(2) atoms. In the second Cd site, Cd(2) is bonded in a 12-coordinate geometry to four equivalent Er(1) and eight equivalent Cd(1) atoms.
ErCd3 crystallizes in the orthorhombic Cmcm space group. Er(1) is bonded in a 10-coordinate geometry to four equivalent Cd(2) and eight equivalent Cd(1) atoms. There are two shorter (3.15 Å) and two longer (3.59 Å) Er(1)-Cd(2) bond lengths. There are six shorter (3.17 Å) and two longer (3.29 Å) Er(1)-Cd(1) bond lengths. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 11-coordinate geometry to four equivalent Er(1), three equivalent Cd(1), and four equivalent Cd(2) atoms. There is one shorter (3.05 Å) and two longer (3.15 Å) Cd(1)-Cd(1) bond lengths. There are a spread of Cd(1)-Cd(2) bond distances ranging from 2.98-3.28 Å. In the second Cd site, Cd(2) is bonded in a 12-coordinate geometry to four equivalent Er(1) and eight equivalent Cd(1) atoms.