SmFe2Ge2 crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded in a 16-coordinate geometry to eight equivalent Fe(1) and eight equivalent Ge(1) atoms. Fe(1) is bonded to four equivalent Sm(1) and four equivalent Ge(1) atoms to form a mixture of distorted face, corner, and edge-sharing FeSm4Ge4 tetrahedra. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), four equivalent Fe(1), and one Ge(1) atom.
SmFe2Ge2 crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded in a 16-coordinate geometry to eight equivalent Fe(1) and eight equivalent Ge(1) atoms. All Sm(1)-Fe(1) bond lengths are 3.37 Å. All Sm(1)-Ge(1) bond lengths are 3.08 Å. Fe(1) is bonded to four equivalent Sm(1) and four equivalent Ge(1) atoms to form a mixture of distorted face, corner, and edge-sharing FeSm4Ge4 tetrahedra. All Fe(1)-Ge(1) bond lengths are 2.46 Å. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), four equivalent Fe(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.54 Å.