Y(Mn2Fe)4 crystallizes in the tetragonal I4/mmm space group. Y(1) is bonded in a 20-coordinate geometry to four equivalent Mn(1), eight equivalent Mn(2), and eight equivalent Fe(1) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 14-coordinate geometry to one Y(1), four equivalent Mn(2), five equivalent Mn(1), and four equivalent Fe(1) atoms. In the second Mn site, Mn(2) is bonded in a 4-coordinate geometry to two equivalent Y(1), four equivalent Mn(1), and four equivalent Fe(1) atoms. Fe(1) is bonded to two equivalent Y(1), four equivalent Mn(1), four equivalent Mn(2), and two equivalent Fe(1) atoms to form a mixture of distorted corner, edge, and face-sharing FeY2Mn8Fe2 cuboctahedra.
Y(Mn2Fe)4 crystallizes in the tetragonal I4/mmm space group. Y(1) is bonded in a 20-coordinate geometry to four equivalent Mn(1), eight equivalent Mn(2), and eight equivalent Fe(1) atoms. All Y(1)-Mn(1) bond lengths are 3.00 Å. All Y(1)-Mn(2) bond lengths are 3.05 Å. All Y(1)-Fe(1) bond lengths are 3.18 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 14-coordinate geometry to one Y(1), four equivalent Mn(2), five equivalent Mn(1), and four equivalent Fe(1) atoms. There are two shorter (2.54 Å) and two longer (2.58 Å) Mn(1)-Mn(2) bond lengths. There is one shorter (2.37 Å) and four longer (2.89 Å) Mn(1)-Mn(1) bond lengths. All Mn(1)-Fe(1) bond lengths are 2.57 Å. In the second Mn site, Mn(2) is bonded in a 4-coordinate geometry to two equivalent Y(1), four equivalent Mn(1), and four equivalent Fe(1) atoms. All Mn(2)-Fe(1) bond lengths are 2.40 Å. Fe(1) is bonded to two equivalent Y(1), four equivalent Mn(1), four equivalent Mn(2), and two equivalent Fe(1) atoms to form a mixture of distorted corner, edge, and face-sharing FeY2Mn8Fe2 cuboctahedra. Both Fe(1)-Fe(1) bond lengths are 2.36 Å.