Lu2Fe3Si5 crystallizes in the tetragonal P4/mnc space group. Lu(1) is bonded in a 13-coordinate geometry to two equivalent Fe(1), two equivalent Fe(2), two equivalent Si(3), three equivalent Si(1), and four equivalent Si(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 6-coordinate geometry to two equivalent Lu(1), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to four equivalent Lu(1), two equivalent Fe(2), two equivalent Si(2), and four equivalent Si(1) atoms. There are three inequivalent Si sites. In the first Si site, Si(3) is bonded in a 8-coordinate geometry to four equivalent Lu(1) and four equivalent Fe(1) atoms. In the second Si site, Si(1) is bonded in a 9-coordinate geometry to three equivalent Lu(1), two equivalent Fe(1), two equivalent Fe(2), and two equivalent Si(2) atoms. In the third Si site, Si(2) is bonded in a 11-coordinate geometry to four equivalent Lu(1), one Fe(2), two equivalent Fe(1), two equivalent Si(1), and two equivalent Si(2) atoms.
Lu2Fe3Si5 crystallizes in the tetragonal P4/mnc space group. Lu(1) is bonded in a 13-coordinate geometry to two equivalent Fe(1), two equivalent Fe(2), two equivalent Si(3), three equivalent Si(1), and four equivalent Si(2) atoms. Both Lu(1)-Fe(1) bond lengths are 3.03 Å. Both Lu(1)-Fe(2) bond lengths are 3.08 Å. Both Lu(1)-Si(3) bond lengths are 2.89 Å. There is one shorter (2.70 Å) and two longer (2.85 Å) Lu(1)-Si(1) bond lengths. All Lu(1)-Si(2) bond lengths are 2.98 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 6-coordinate geometry to two equivalent Lu(1), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. There is one shorter (2.34 Å) and one longer (2.36 Å) Fe(1)-Si(1) bond length. Both Fe(1)-Si(2) bond lengths are 2.32 Å. Both Fe(1)-Si(3) bond lengths are 2.33 Å. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to four equivalent Lu(1), two equivalent Fe(2), two equivalent Si(2), and four equivalent Si(1) atoms. Both Fe(2)-Fe(2) bond lengths are 2.68 Å. Both Fe(2)-Si(2) bond lengths are 2.57 Å. All Fe(2)-Si(1) bond lengths are 2.29 Å. There are three inequivalent Si sites. In the first Si site, Si(3) is bonded in a 8-coordinate geometry to four equivalent Lu(1) and four equivalent Fe(1) atoms. In the second Si site, Si(1) is bonded in a 9-coordinate geometry to three equivalent Lu(1), two equivalent Fe(1), two equivalent Fe(2), and two equivalent Si(2) atoms. Both Si(1)-Si(2) bond lengths are 2.45 Å. In the third Si site, Si(2) is bonded in a 11-coordinate geometry to four equivalent Lu(1), one Fe(2), two equivalent Fe(1), two equivalent Si(1), and two equivalent Si(2) atoms. Both Si(2)-Si(2) bond lengths are 2.68 Å.