U6Fe crystallizes in the tetragonal I4/mcm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a distorted T-shaped geometry to five equivalent U(1) and eight equivalent U(2) atoms. In the second U site, U(2) is bonded in a 4-coordinate geometry to one U(2), four equivalent U(1), and two equivalent Fe(1) atoms. Fe(1) is bonded in a 10-coordinate geometry to eight equivalent U(2) and two equivalent Fe(1) atoms.
U6Fe crystallizes in the tetragonal I4/mcm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a distorted T-shaped geometry to five equivalent U(1) and eight equivalent U(2) atoms. There is one shorter (2.69 Å) and four longer (3.24 Å) U(1)-U(1) bond lengths. There are a spread of U(1)-U(2) bond distances ranging from 2.75-3.34 Å. In the second U site, U(2) is bonded in a 4-coordinate geometry to one U(2), four equivalent U(1), and two equivalent Fe(1) atoms. The U(2)-U(2) bond length is 2.61 Å. Both U(2)-Fe(1) bond lengths are 2.76 Å. Fe(1) is bonded in a 10-coordinate geometry to eight equivalent U(2) and two equivalent Fe(1) atoms. Both Fe(1)-Fe(1) bond lengths are 2.63 Å.