SmCoGe2 crystallizes in the orthorhombic Cmcm space group. Sm(1) is bonded in a 14-coordinate geometry to four equivalent Co(1), four equivalent Ge(2), and six equivalent Ge(1) atoms. Co(1) is bonded in a 5-coordinate geometry to four equivalent Sm(1), one Ge(1), and four equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to six equivalent Sm(1), one Co(1), and two equivalent Ge(1) atoms. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to four equivalent Sm(1) and four equivalent Co(1) atoms.
SmCoGe2 crystallizes in the orthorhombic Cmcm space group. Sm(1) is bonded in a 14-coordinate geometry to four equivalent Co(1), four equivalent Ge(2), and six equivalent Ge(1) atoms. All Sm(1)-Co(1) bond lengths are 3.19 Å. There are two shorter (3.12 Å) and two longer (3.13 Å) Sm(1)-Ge(2) bond lengths. There are four shorter (3.14 Å) and two longer (3.31 Å) Sm(1)-Ge(1) bond lengths. Co(1) is bonded in a 5-coordinate geometry to four equivalent Sm(1), one Ge(1), and four equivalent Ge(2) atoms. The Co(1)-Ge(1) bond length is 2.26 Å. There are two shorter (2.36 Å) and two longer (2.38 Å) Co(1)-Ge(2) bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to six equivalent Sm(1), one Co(1), and two equivalent Ge(1) atoms. Both Ge(1)-Ge(1) bond lengths are 2.56 Å. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to four equivalent Sm(1) and four equivalent Co(1) atoms.