Ti2Co3Ge crystallizes in the trigonal P3m1 space group. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a hexagonal planar geometry to six equivalent Co(1) atoms. In the second Ti site, Ti(2) is bonded in a 9-coordinate geometry to six equivalent Co(1) and three equivalent Ge(1) atoms. Co(1) is bonded in a 10-coordinate geometry to two equivalent Ti(1), two equivalent Ti(2), four equivalent Co(1), and two equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to three equivalent Ti(2) and six equivalent Co(1) atoms.
Ti2Co3Ge crystallizes in the trigonal P3m1 space group. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a hexagonal planar geometry to six equivalent Co(1) atoms. All Ti(1)-Co(1) bond lengths are 2.49 Å. In the second Ti site, Ti(2) is bonded in a 9-coordinate geometry to six equivalent Co(1) and three equivalent Ge(1) atoms. There are three shorter (2.46 Å) and three longer (2.50 Å) Ti(2)-Co(1) bond lengths. All Ti(2)-Ge(1) bond lengths are 2.85 Å. Co(1) is bonded in a 10-coordinate geometry to two equivalent Ti(1), two equivalent Ti(2), four equivalent Co(1), and two equivalent Ge(1) atoms. There are two shorter (2.43 Å) and two longer (2.50 Å) Co(1)-Co(1) bond lengths. Both Co(1)-Ge(1) bond lengths are 2.46 Å. Ge(1) is bonded in a 9-coordinate geometry to three equivalent Ti(2) and six equivalent Co(1) atoms.