Nd9Ga4 crystallizes in the tetragonal I4/m space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 4-coordinate geometry to four equivalent Ga(1) atoms. In the second Nd site, Nd(2) is bonded in a square co-planar geometry to four equivalent Ga(1) atoms. In the third Nd site, Nd(3) is bonded in a 3-coordinate geometry to five equivalent Ga(1) atoms. Ga(1) is bonded in a 10-coordinate geometry to one Nd(2), four equivalent Nd(1), and five equivalent Nd(3) atoms.
Nd9Ga4 crystallizes in the tetragonal I4/m space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 4-coordinate geometry to four equivalent Ga(1) atoms. There are a spread of Nd(1)-Ga(1) bond distances ranging from 3.02-3.53 Å. In the second Nd site, Nd(2) is bonded in a square co-planar geometry to four equivalent Ga(1) atoms. All Nd(2)-Ga(1) bond lengths are 3.10 Å. In the third Nd site, Nd(3) is bonded in a 3-coordinate geometry to five equivalent Ga(1) atoms. There are a spread of Nd(3)-Ga(1) bond distances ranging from 3.07-3.81 Å. Ga(1) is bonded in a 10-coordinate geometry to one Nd(2), four equivalent Nd(1), and five equivalent Nd(3) atoms.