Sm2Re3Si5 crystallizes in the tetragonal P4/mnc space group. Sm(1) is bonded in a 11-coordinate geometry to two equivalent Re(1), two equivalent Re(2), two equivalent Si(2), three equivalent Si(3), and four equivalent Si(1) atoms. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded in a 8-coordinate geometry to two equivalent Sm(1), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. In the second Re site, Re(2) is bonded to four equivalent Sm(1), two equivalent Re(2), two equivalent Si(1), and four equivalent Si(3) atoms to form a mixture of corner and face-sharing ReSm4Re2Si6 cuboctahedra. There are three inequivalent Si sites. In the first Si site, Si(3) is bonded in a 9-coordinate geometry to three equivalent Sm(1), two equivalent Re(1), two equivalent Re(2), and two equivalent Si(1) atoms. In the second Si site, Si(1) is bonded in a 11-coordinate geometry to four equivalent Sm(1), one Re(2), two equivalent Re(1), two equivalent Si(1), and two equivalent Si(3) atoms. In the third Si site, Si(2) is bonded in a 10-coordinate geometry to four equivalent Sm(1), four equivalent Re(1), and two equivalent Si(2) atoms.
Sm2Re3Si5 crystallizes in the tetragonal P4/mnc space group. Sm(1) is bonded in a 11-coordinate geometry to two equivalent Re(1), two equivalent Re(2), two equivalent Si(2), three equivalent Si(3), and four equivalent Si(1) atoms. Both Sm(1)-Re(1) bond lengths are 3.17 Å. Both Sm(1)-Re(2) bond lengths are 3.32 Å. Both Sm(1)-Si(2) bond lengths are 3.11 Å. There is one shorter (2.87 Å) and two longer (3.00 Å) Sm(1)-Si(3) bond lengths. There are two shorter (3.17 Å) and two longer (3.24 Å) Sm(1)-Si(1) bond lengths. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded in a 8-coordinate geometry to two equivalent Sm(1), two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. Both Re(1)-Si(1) bond lengths are 2.48 Å. Both Re(1)-Si(2) bond lengths are 2.53 Å. There is one shorter (2.46 Å) and one longer (2.50 Å) Re(1)-Si(3) bond length. In the second Re site, Re(2) is bonded to four equivalent Sm(1), two equivalent Re(2), two equivalent Si(1), and four equivalent Si(3) atoms to form a mixture of corner and face-sharing ReSm4Re2Si6 cuboctahedra. Both Re(2)-Re(2) bond lengths are 2.81 Å. Both Re(2)-Si(1) bond lengths are 2.67 Å. All Re(2)-Si(3) bond lengths are 2.48 Å. There are three inequivalent Si sites. In the first Si site, Si(3) is bonded in a 9-coordinate geometry to three equivalent Sm(1), two equivalent Re(1), two equivalent Re(2), and two equivalent Si(1) atoms. Both Si(3)-Si(1) bond lengths are 2.57 Å. In the second Si site, Si(1) is bonded in a 11-coordinate geometry to four equivalent Sm(1), one Re(2), two equivalent Re(1), two equivalent Si(1), and two equivalent Si(3) atoms. Both Si(1)-Si(1) bond lengths are 2.81 Å. In the third Si site, Si(2) is bonded in a 10-coordinate geometry to four equivalent Sm(1), four equivalent Re(1), and two equivalent Si(2) atoms. There is one shorter (2.70 Å) and one longer (2.92 Å) Si(2)-Si(2) bond length.