U2Mn3Si5 crystallizes in the tetragonal P4/mnc space group. U(1) is bonded in a 13-coordinate geometry to two equivalent Mn(1), two equivalent Mn(2), two equivalent Si(2), three equivalent Si(1), and four equivalent Si(3) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to two equivalent U(1), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to four equivalent U(1), two equivalent Si(3), and four equivalent Si(1) atoms. There are three inequivalent Si sites. In the first Si site, Si(3) is bonded in a 11-coordinate geometry to four equivalent U(1), one Mn(2), two equivalent Mn(1), two equivalent Si(1), and two equivalent Si(3) atoms. In the second Si site, Si(1) is bonded in a 9-coordinate geometry to three equivalent U(1), two equivalent Mn(1), two equivalent Mn(2), and two equivalent Si(3) atoms. In the third Si site, Si(2) is bonded in a 8-coordinate geometry to four equivalent U(1) and four equivalent Mn(1) atoms.
U2Mn3Si5 crystallizes in the tetragonal P4/mnc space group. U(1) is bonded in a 13-coordinate geometry to two equivalent Mn(1), two equivalent Mn(2), two equivalent Si(2), three equivalent Si(1), and four equivalent Si(3) atoms. Both U(1)-Mn(1) bond lengths are 3.03 Å. Both U(1)-Mn(2) bond lengths are 3.20 Å. Both U(1)-Si(2) bond lengths are 2.96 Å. There is one shorter (2.85 Å) and two longer (2.88 Å) U(1)-Si(1) bond lengths. There are two shorter (3.05 Å) and two longer (3.10 Å) U(1)-Si(3) bond lengths. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to two equivalent U(1), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. Both Mn(1)-Si(1) bond lengths are 2.39 Å. Both Mn(1)-Si(2) bond lengths are 2.36 Å. Both Mn(1)-Si(3) bond lengths are 2.42 Å. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to four equivalent U(1), two equivalent Si(3), and four equivalent Si(1) atoms. Both Mn(2)-Si(3) bond lengths are 2.64 Å. All Mn(2)-Si(1) bond lengths are 2.39 Å. There are three inequivalent Si sites. In the first Si site, Si(3) is bonded in a 11-coordinate geometry to four equivalent U(1), one Mn(2), two equivalent Mn(1), two equivalent Si(1), and two equivalent Si(3) atoms. Both Si(3)-Si(1) bond lengths are 2.48 Å. Both Si(3)-Si(3) bond lengths are 2.70 Å. In the second Si site, Si(1) is bonded in a 9-coordinate geometry to three equivalent U(1), two equivalent Mn(1), two equivalent Mn(2), and two equivalent Si(3) atoms. In the third Si site, Si(2) is bonded in a 8-coordinate geometry to four equivalent U(1) and four equivalent Mn(1) atoms.