LaCoGe3 crystallizes in the tetragonal I4mm space group. La(1) is bonded in a 17-coordinate geometry to five equivalent Co(1), four equivalent Ge(2), and eight equivalent Ge(1) atoms. Co(1) is bonded in a 5-coordinate geometry to five equivalent La(1), one Ge(2), and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 2-coordinate geometry to four equivalent La(1), two equivalent Co(1), and two equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent La(1), one Co(1), and four equivalent Ge(1) atoms.
LaCoGe3 crystallizes in the tetragonal I4mm space group. La(1) is bonded in a 17-coordinate geometry to five equivalent Co(1), four equivalent Ge(2), and eight equivalent Ge(1) atoms. There is one shorter (3.29 Å) and four longer (3.47 Å) La(1)-Co(1) bond lengths. All La(1)-Ge(2) bond lengths are 3.14 Å. There are four shorter (3.22 Å) and four longer (3.34 Å) La(1)-Ge(1) bond lengths. Co(1) is bonded in a 5-coordinate geometry to five equivalent La(1), one Ge(2), and four equivalent Ge(1) atoms. The Co(1)-Ge(2) bond length is 2.29 Å. All Co(1)-Ge(1) bond lengths are 2.35 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 2-coordinate geometry to four equivalent La(1), two equivalent Co(1), and two equivalent Ge(2) atoms. Both Ge(1)-Ge(2) bond lengths are 2.76 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent La(1), one Co(1), and four equivalent Ge(1) atoms.