Ni4Ga3Si crystallizes in the trigonal R3 space group. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 7-coordinate geometry to six equivalent Ga(1) and one Si(1) atom. In the second Ni site, Ni(2) is bonded in a 7-coordinate geometry to five equivalent Ga(1) and two equivalent Si(1) atoms. Ga(1) is bonded in a 7-coordinate geometry to two equivalent Ni(1), five equivalent Ni(2), and two equivalent Si(1) atoms. Si(1) is bonded in a 13-coordinate geometry to one Ni(1), six equivalent Ni(2), and six equivalent Ga(1) atoms.
Ni4Ga3Si crystallizes in the trigonal R3 space group. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 7-coordinate geometry to six equivalent Ga(1) and one Si(1) atom. There are three shorter (2.44 Å) and three longer (2.56 Å) Ni(1)-Ga(1) bond lengths. The Ni(1)-Si(1) bond length is 2.30 Å. In the second Ni site, Ni(2) is bonded in a 7-coordinate geometry to five equivalent Ga(1) and two equivalent Si(1) atoms. There are a spread of Ni(2)-Ga(1) bond distances ranging from 2.42-2.54 Å. There is one shorter (2.37 Å) and one longer (2.56 Å) Ni(2)-Si(1) bond length. Ga(1) is bonded in a 7-coordinate geometry to two equivalent Ni(1), five equivalent Ni(2), and two equivalent Si(1) atoms. Both Ga(1)-Si(1) bond lengths are 2.87 Å. Si(1) is bonded in a 13-coordinate geometry to one Ni(1), six equivalent Ni(2), and six equivalent Ga(1) atoms.