Ni19Ge12 crystallizes in the monoclinic C2 space group. There are ten inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 11-coordinate geometry to two equivalent Ni(10), two equivalent Ni(6), two equivalent Ni(7), one Ge(2), two equivalent Ge(3), and two equivalent Ge(5) atoms. In the second Ni site, Ni(2) is bonded in a 11-coordinate geometry to one Ni(10), one Ni(5), one Ni(6), one Ni(7), one Ni(8), one Ni(9), one Ge(1), one Ge(2), one Ge(3), one Ge(6), and one Ge(7) atom. In the third Ni site, Ni(3) is bonded in a 11-coordinate geometry to one Ni(10), one Ni(5), one Ni(6), one Ni(7), one Ni(8), one Ni(9), one Ge(3), one Ge(4), one Ge(5), one Ge(6), and one Ge(7) atom. In the fourth Ni site, Ni(4) is bonded in a 11-coordinate geometry to two equivalent Ni(5), two equivalent Ni(8), two equivalent Ni(9), one Ge(1), one Ge(6), one Ge(7), and two equivalent Ge(4) atoms. In the fifth Ni site, Ni(5) is bonded in a 12-coordinate geometry to one Ni(2), one Ni(3), one Ni(6), one Ni(8), two equivalent Ni(4), one Ge(1), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(4) atoms. In the sixth Ni site, Ni(6) is bonded in a 11-coordinate geometry to one Ni(1), one Ni(2), one Ni(3), one Ni(5), one Ni(7), one Ge(2), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(5) atoms. In the seventh Ni site, Ni(7) is bonded in a 11-coordinate geometry to one Ni(1), one Ni(2), one Ni(3), one Ni(6), one Ni(8), one Ge(2), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(5) atoms. In the eighth Ni site, Ni(8) is bonded to one Ni(2), one Ni(3), one Ni(5), one Ni(7), two equivalent Ni(4), one Ge(1), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(4) atoms to form a mixture of distorted corner, edge, and face-sharing NiNi6Ge6 cuboctahedra. In the ninth Ni site, Ni(9) is bonded to one Ni(10), one Ni(2), one Ni(3), one Ni(9), two equivalent Ni(4), one Ge(1), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(4) atoms to form a mixture of distorted corner, edge, and face-sharing NiNi6Ge6 cuboctahedra. In the tenth Ni site, Ni(10) is bonded in a 11-coordinate geometry to one Ni(1), one Ni(10), one Ni(2), one Ni(3), one Ni(9), one Ge(2), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(5) atoms. There are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 10-coordinate geometry to two equivalent Ni(2), two equivalent Ni(4), two equivalent Ni(5), two equivalent Ni(8), and two equivalent Ni(9) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Ni(1), two equivalent Ni(10), two equivalent Ni(2), two equivalent Ni(6), and two equivalent Ni(7) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to one Ni(1), one Ni(10), one Ni(2), one Ni(3), one Ni(5), one Ni(6), one Ni(7), one Ni(8), and one Ni(9) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to one Ni(3), two equivalent Ni(4), two equivalent Ni(5), two equivalent Ni(8), and two equivalent Ni(9) atoms. In the fifth Ge site, Ge(5) is bonded in a 8-coordinate geometry to one Ni(1), one Ni(3), two equivalent Ni(10), two equivalent Ni(6), and two equivalent Ni(7) atoms. In the sixth Ge site, Ge(6) is bonded in a 7-coordinate geometry to one Ni(10), one Ni(2), one Ni(3), one Ni(4), one Ni(5), one Ni(6), one Ni(7), one Ni(8), and one Ni(9) atom. In the seventh Ge site, Ge(7) is bonded in a 9-coordinate geometry to one Ni(10), one Ni(2), one Ni(3), one Ni(4), one Ni(5), one Ni(6), one Ni(7), one Ni(8), and one Ni(9) atom.
Ni19Ge12 crystallizes in the monoclinic C2 space group. There are ten inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 11-coordinate geometry to two equivalent Ni(10), two equivalent Ni(6), two equivalent Ni(7), one Ge(2), two equivalent Ge(3), and two equivalent Ge(5) atoms. Both Ni(1)-Ni(10) bond lengths are 2.58 Å. Both Ni(1)-Ni(6) bond lengths are 2.56 Å. Both Ni(1)-Ni(7) bond lengths are 2.67 Å. The Ni(1)-Ge(2) bond length is 2.36 Å. Both Ni(1)-Ge(3) bond lengths are 2.50 Å. Both Ni(1)-Ge(5) bond lengths are 2.36 Å. In the second Ni site, Ni(2) is bonded in a 11-coordinate geometry to one Ni(10), one Ni(5), one Ni(6), one Ni(7), one Ni(8), one Ni(9), one Ge(1), one Ge(2), one Ge(3), one Ge(6), and one Ge(7) atom. The Ni(2)-Ni(10) bond length is 2.55 Å. The Ni(2)-Ni(5) bond length is 2.58 Å. The Ni(2)-Ni(6) bond length is 2.62 Å. The Ni(2)-Ni(7) bond length is 2.62 Å. The Ni(2)-Ni(8) bond length is 2.56 Å. The Ni(2)-Ni(9) bond length is 2.64 Å. The Ni(2)-Ge(1) bond length is 2.57 Å. The Ni(2)-Ge(2) bond length is 2.47 Å. The Ni(2)-Ge(3) bond length is 2.36 Å. The Ni(2)-Ge(6) bond length is 2.36 Å. The Ni(2)-Ge(7) bond length is 2.36 Å. In the third Ni site, Ni(3) is bonded in a 11-coordinate geometry to one Ni(10), one Ni(5), one Ni(6), one Ni(7), one Ni(8), one Ni(9), one Ge(3), one Ge(4), one Ge(5), one Ge(6), and one Ge(7) atom. The Ni(3)-Ni(10) bond length is 2.65 Å. The Ni(3)-Ni(5) bond length is 2.67 Å. The Ni(3)-Ni(6) bond length is 2.56 Å. The Ni(3)-Ni(7) bond length is 2.63 Å. The Ni(3)-Ni(8) bond length is 2.59 Å. The Ni(3)-Ni(9) bond length is 2.58 Å. The Ni(3)-Ge(3) bond length is 2.35 Å. The Ni(3)-Ge(4) bond length is 2.53 Å. The Ni(3)-Ge(5) bond length is 2.48 Å. The Ni(3)-Ge(6) bond length is 2.35 Å. The Ni(3)-Ge(7) bond length is 2.36 Å. In the fourth Ni site, Ni(4) is bonded in a 11-coordinate geometry to two equivalent Ni(5), two equivalent Ni(8), two equivalent Ni(9), one Ge(1), one Ge(6), one Ge(7), and two equivalent Ge(4) atoms. There is one shorter (2.58 Å) and one longer (2.66 Å) Ni(4)-Ni(5) bond length. There is one shorter (2.57 Å) and one longer (2.59 Å) Ni(4)-Ni(8) bond length. There is one shorter (2.58 Å) and one longer (2.64 Å) Ni(4)-Ni(9) bond length. The Ni(4)-Ge(1) bond length is 2.36 Å. The Ni(4)-Ge(6) bond length is 2.51 Å. The Ni(4)-Ge(7) bond length is 2.54 Å. Both Ni(4)-Ge(4) bond lengths are 2.35 Å. In the fifth Ni site, Ni(5) is bonded in a 12-coordinate geometry to one Ni(2), one Ni(3), one Ni(6), one Ni(8), two equivalent Ni(4), one Ge(1), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(4) atoms. The Ni(5)-Ni(6) bond length is 2.53 Å. The Ni(5)-Ni(8) bond length is 2.53 Å. The Ni(5)-Ge(1) bond length is 2.46 Å. The Ni(5)-Ge(3) bond length is 2.41 Å. The Ni(5)-Ge(6) bond length is 2.50 Å. The Ni(5)-Ge(7) bond length is 2.77 Å. There is one shorter (2.43 Å) and one longer (2.86 Å) Ni(5)-Ge(4) bond length. In the sixth Ni site, Ni(6) is bonded in a 11-coordinate geometry to one Ni(1), one Ni(2), one Ni(3), one Ni(5), one Ni(7), one Ge(2), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(5) atoms. The Ni(6)-Ni(7) bond length is 2.49 Å. The Ni(6)-Ge(2) bond length is 2.66 Å. The Ni(6)-Ge(3) bond length is 2.48 Å. The Ni(6)-Ge(6) bond length is 2.43 Å. The Ni(6)-Ge(7) bond length is 2.78 Å. There is one shorter (2.45 Å) and one longer (2.57 Å) Ni(6)-Ge(5) bond length. In the seventh Ni site, Ni(7) is bonded in a 11-coordinate geometry to one Ni(1), one Ni(2), one Ni(3), one Ni(6), one Ni(8), one Ge(2), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(5) atoms. The Ni(7)-Ni(8) bond length is 2.53 Å. The Ni(7)-Ge(2) bond length is 2.70 Å. The Ni(7)-Ge(3) bond length is 2.86 Å. The Ni(7)-Ge(6) bond length is 2.42 Å. The Ni(7)-Ge(7) bond length is 2.43 Å. There is one shorter (2.37 Å) and one longer (2.63 Å) Ni(7)-Ge(5) bond length. In the eighth Ni site, Ni(8) is bonded to one Ni(2), one Ni(3), one Ni(5), one Ni(7), two equivalent Ni(4), one Ge(1), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(4) atoms to form a mixture of distorted corner, edge, and face-sharing NiNi6Ge6 cuboctahedra. The Ni(8)-Ge(1) bond length is 2.48 Å. The Ni(8)-Ge(3) bond length is 2.73 Å. The Ni(8)-Ge(6) bond length is 2.49 Å. The Ni(8)-Ge(7) bond length is 2.49 Å. There is one shorter (2.46 Å) and one longer (2.81 Å) Ni(8)-Ge(4) bond length. In the ninth Ni site, Ni(9) is bonded to one Ni(10), one Ni(2), one Ni(3), one Ni(9), two equivalent Ni(4), one Ge(1), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(4) atoms to form a mixture of distorted corner, edge, and face-sharing NiNi6Ge6 cuboctahedra. The Ni(9)-Ni(10) bond length is 2.53 Å. The Ni(9)-Ni(9) bond length is 2.54 Å. The Ni(9)-Ge(1) bond length is 2.80 Å. The Ni(9)-Ge(3) bond length is 2.43 Å. The Ni(9)-Ge(6) bond length is 2.89 Å. The Ni(9)-Ge(7) bond length is 2.46 Å. There is one shorter (2.42 Å) and one longer (2.49 Å) Ni(9)-Ge(4) bond length. In the tenth Ni site, Ni(10) is bonded in a 11-coordinate geometry to one Ni(1), one Ni(10), one Ni(2), one Ni(3), one Ni(9), one Ge(2), one Ge(3), one Ge(6), one Ge(7), and two equivalent Ge(5) atoms. The Ni(10)-Ni(10) bond length is 2.49 Å. The Ni(10)-Ge(2) bond length is 2.44 Å. The Ni(10)-Ge(3) bond length is 2.48 Å. The Ni(10)-Ge(6) bond length is 2.90 Å. The Ni(10)-Ge(7) bond length is 2.42 Å. There is one shorter (2.53 Å) and one longer (2.72 Å) Ni(10)-Ge(5) bond length. There are seven inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 10-coordinate geometry to two equivalent Ni(2), two equivalent Ni(4), two equivalent Ni(5), two equivalent Ni(8), and two equivalent Ni(9) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Ni(1), two equivalent Ni(10), two equivalent Ni(2), two equivalent Ni(6), and two equivalent Ni(7) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to one Ni(1), one Ni(10), one Ni(2), one Ni(3), one Ni(5), one Ni(6), one Ni(7), one Ni(8), and one Ni(9) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to one Ni(3), two equivalent Ni(4), two equivalent Ni(5), two equivalent Ni(8), and two equivalent Ni(9) atoms. In the fifth Ge site, Ge(5) is bonded in a 8-coordinate geometry to one Ni(1), one Ni(3), two equivalent Ni(10), two equivalent Ni(6), and two equivalent Ni(7) atoms. In the sixth Ge site, Ge(6) is bonded in a 7-coordinate geometry to one Ni(10), one Ni(2), one Ni(3), one Ni(4), one Ni(5), one Ni(6), one Ni(7), one Ni(8), and one Ni(9) atom. In the seventh Ge site, Ge(7) is bonded in a 9-coordinate geometry to one Ni(10), one Ni(2), one Ni(3), one Ni(4), one Ni(5), one Ni(6), one Ni(7), one Ni(8), and one Ni(9) atom.