Sm(Re2Si)2 crystallizes in the tetragonal P4_2/mnm space group. Sm(1) is bonded in a 18-coordinate geometry to twelve equivalent Re(1) and six equivalent Si(1) atoms. Re(1) is bonded to three equivalent Sm(1), six equivalent Re(1), and three equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing ReSm3Re6Si3 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Re(1) atoms.
Sm(Re2Si)2 crystallizes in the tetragonal P4_2/mnm space group. Sm(1) is bonded in a 18-coordinate geometry to twelve equivalent Re(1) and six equivalent Si(1) atoms. There are four shorter (3.24 Å) and eight longer (3.35 Å) Sm(1)-Re(1) bond lengths. There are four shorter (3.02 Å) and two longer (3.04 Å) Sm(1)-Si(1) bond lengths. Re(1) is bonded to three equivalent Sm(1), six equivalent Re(1), and three equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing ReSm3Re6Si3 cuboctahedra. There are a spread of Re(1)-Re(1) bond distances ranging from 2.62-2.82 Å. There is one shorter (2.45 Å) and two longer (2.56 Å) Re(1)-Si(1) bond lengths. Si(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Re(1) atoms.