FeMn is Tetraauricupride structured and crystallizes in the tetragonal P4/mmm space group. Mn(1) is bonded to four equivalent Mn(1) and eight equivalent Fe(1) atoms to form MnMn4Fe8 cuboctahedra that share corners with twelve equivalent Mn(1)Mn4Fe8 cuboctahedra, edges with eight equivalent Mn(1)Mn4Fe8 cuboctahedra, edges with sixteen equivalent Fe(1)Mn8Fe4 cuboctahedra, faces with eight equivalent Fe(1)Mn8Fe4 cuboctahedra, and faces with ten equivalent Mn(1)Mn4Fe8 cuboctahedra. Fe(1) is bonded to eight equivalent Mn(1) and four equivalent Fe(1) atoms to form FeMn8Fe4 cuboctahedra that share corners with twelve equivalent Fe(1)Mn8Fe4 cuboctahedra, edges with eight equivalent Fe(1)Mn8Fe4 cuboctahedra, edges with sixteen equivalent Mn(1)Mn4Fe8 cuboctahedra, faces with eight equivalent Mn(1)Mn4Fe8 cuboctahedra, and faces with ten equivalent Fe(1)Mn8Fe4 cuboctahedra.
FeMn is Tetraauricupride structured and crystallizes in the tetragonal P4/mmm space group. Mn(1) is bonded to four equivalent Mn(1) and eight equivalent Fe(1) atoms to form MnMn4Fe8 cuboctahedra that share corners with twelve equivalent Mn(1)Mn4Fe8 cuboctahedra, edges with eight equivalent Mn(1)Mn4Fe8 cuboctahedra, edges with sixteen equivalent Fe(1)Mn8Fe4 cuboctahedra, faces with eight equivalent Fe(1)Mn8Fe4 cuboctahedra, and faces with ten equivalent Mn(1)Mn4Fe8 cuboctahedra. All Mn(1)-Mn(1) bond lengths are 2.46 Å. All Mn(1)-Fe(1) bond lengths are 2.46 Å. Fe(1) is bonded to eight equivalent Mn(1) and four equivalent Fe(1) atoms to form FeMn8Fe4 cuboctahedra that share corners with twelve equivalent Fe(1)Mn8Fe4 cuboctahedra, edges with eight equivalent Fe(1)Mn8Fe4 cuboctahedra, edges with sixteen equivalent Mn(1)Mn4Fe8 cuboctahedra, faces with eight equivalent Mn(1)Mn4Fe8 cuboctahedra, and faces with ten equivalent Fe(1)Mn8Fe4 cuboctahedra. All Fe(1)-Fe(1) bond lengths are 2.46 Å.