Sm2FeGe4 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 11-coordinate geometry to one Fe(1), two equivalent Ge(1), two equivalent Ge(3), two equivalent Ge(4), and four equivalent Ge(2) atoms. In the second Sm site, Sm(2) is bonded in a 14-coordinate geometry to four equivalent Fe(1), two equivalent Ge(2), two equivalent Ge(3), two equivalent Ge(4), and four equivalent Ge(1) atoms. Fe(1) is bonded in a 5-coordinate geometry to one Sm(1), four equivalent Sm(2), one Ge(1), two equivalent Ge(3), and two equivalent Ge(4) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Sm(1), four equivalent Sm(2), one Fe(1), and two equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to two equivalent Sm(2), four equivalent Sm(1), and two equivalent Ge(1) atoms. In the third Ge site, Ge(3) is bonded in a 6-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), and two equivalent Fe(1) atoms. In the fourth Ge site, Ge(4) is bonded in a 6-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), and two equivalent Fe(1) atoms.
Sm2FeGe4 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 11-coordinate geometry to one Fe(1), two equivalent Ge(1), two equivalent Ge(3), two equivalent Ge(4), and four equivalent Ge(2) atoms. The Sm(1)-Fe(1) bond length is 3.18 Å. Both Sm(1)-Ge(1) bond lengths are 3.21 Å. Both Sm(1)-Ge(3) bond lengths are 3.07 Å. Both Sm(1)-Ge(4) bond lengths are 3.10 Å. All Sm(1)-Ge(2) bond lengths are 3.09 Å. In the second Sm site, Sm(2) is bonded in a 14-coordinate geometry to four equivalent Fe(1), two equivalent Ge(2), two equivalent Ge(3), two equivalent Ge(4), and four equivalent Ge(1) atoms. All Sm(2)-Fe(1) bond lengths are 3.36 Å. Both Sm(2)-Ge(2) bond lengths are 3.29 Å. Both Sm(2)-Ge(3) bond lengths are 3.25 Å. Both Sm(2)-Ge(4) bond lengths are 3.23 Å. All Sm(2)-Ge(1) bond lengths are 3.11 Å. Fe(1) is bonded in a 5-coordinate geometry to one Sm(1), four equivalent Sm(2), one Ge(1), two equivalent Ge(3), and two equivalent Ge(4) atoms. The Fe(1)-Ge(1) bond length is 2.33 Å. Both Fe(1)-Ge(3) bond lengths are 2.34 Å. Both Fe(1)-Ge(4) bond lengths are 2.30 Å. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Sm(1), four equivalent Sm(2), one Fe(1), and two equivalent Ge(2) atoms. Both Ge(1)-Ge(2) bond lengths are 2.70 Å. In the second Ge site, Ge(2) is bonded in a 8-coordinate geometry to two equivalent Sm(2), four equivalent Sm(1), and two equivalent Ge(1) atoms. In the third Ge site, Ge(3) is bonded in a 6-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), and two equivalent Fe(1) atoms. In the fourth Ge site, Ge(4) is bonded in a 6-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), and two equivalent Fe(1) atoms.