Ca4Ni4Ge3 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 9-coordinate geometry to four equivalent Ni(2), two equivalent Ge(2), and three equivalent Ge(1) atoms. In the second Ca site, Ca(2) is bonded in a 9-coordinate geometry to one Ni(1), three equivalent Ni(2), two equivalent Ge(1), and three equivalent Ge(2) atoms. In the third Ca site, Ca(3) is bonded in a 8-coordinate geometry to two equivalent Ni(2), six equivalent Ni(1), and six equivalent Ge(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 10-coordinate geometry to one Ca(2), three equivalent Ca(3), one Ni(2), two equivalent Ni(1), and three equivalent Ge(2) atoms. In the second Ni site, Ni(2) is bonded in a 10-coordinate geometry to one Ca(3), two equivalent Ca(1), three equivalent Ca(2), one Ni(1), one Ge(1), and two 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 three equivalent Ca(1), four equivalent Ca(2), and two equivalent Ni(2) atoms. In the second Ge site, Ge(2) is bonded in a 12-coordinate geometry to one Ca(1), three equivalent Ca(2), three equivalent Ca(3), two equivalent Ni(2), and three equivalent Ni(1) atoms.
Ca4Ni4Ge3 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 9-coordinate geometry to four equivalent Ni(2), two equivalent Ge(2), and three equivalent Ge(1) atoms. All Ca(1)-Ni(2) bond lengths are 3.07 Å. Both Ca(1)-Ge(2) bond lengths are 3.23 Å. There are two shorter (2.93 Å) and one longer (3.14 Å) Ca(1)-Ge(1) bond length. In the second Ca site, Ca(2) is bonded in a 9-coordinate geometry to one Ni(1), three equivalent Ni(2), two equivalent Ge(1), and three equivalent Ge(2) atoms. The Ca(2)-Ni(1) bond length is 2.91 Å. There is one shorter (2.99 Å) and two longer (3.04 Å) Ca(2)-Ni(2) bond lengths. Both Ca(2)-Ge(1) bond lengths are 3.03 Å. There is one shorter (3.10 Å) and two longer (3.38 Å) Ca(2)-Ge(2) bond lengths. In the third Ca site, Ca(3) is bonded in a 8-coordinate geometry to two equivalent Ni(2), six equivalent Ni(1), and six equivalent Ge(2) atoms. Both Ca(3)-Ni(2) bond lengths are 3.27 Å. There are two shorter (2.91 Å) and four longer (3.22 Å) Ca(3)-Ni(1) bond lengths. There are two shorter (3.41 Å) and four longer (3.52 Å) Ca(3)-Ge(2) bond lengths. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 10-coordinate geometry to one Ca(2), three equivalent Ca(3), one Ni(2), two equivalent Ni(1), and three equivalent Ge(2) atoms. The Ni(1)-Ni(2) bond length is 2.49 Å. Both Ni(1)-Ni(1) bond lengths are 2.52 Å. There is one shorter (2.40 Å) and two longer (2.41 Å) Ni(1)-Ge(2) bond lengths. In the second Ni site, Ni(2) is bonded in a 10-coordinate geometry to one Ca(3), two equivalent Ca(1), three equivalent Ca(2), one Ni(1), one Ge(1), and two equivalent Ge(2) atoms. The Ni(2)-Ge(1) bond length is 2.47 Å. Both Ni(2)-Ge(2) bond lengths are 2.45 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to three equivalent Ca(1), four equivalent Ca(2), and two equivalent Ni(2) atoms. In the second Ge site, Ge(2) is bonded in a 12-coordinate geometry to one Ca(1), three equivalent Ca(2), three equivalent Ca(3), two equivalent Ni(2), and three equivalent Ni(1) atoms.