Ba2(Ni3B2)3 crystallizes in the trigonal R-3c space group. Ba(1) is bonded in a 6-coordinate geometry to three equivalent Ni(1) and three equivalent Ni(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 4-coordinate geometry to one Ba(1) and four equivalent B(1) atoms. In the second Ni site, Ni(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1) and four equivalent B(1) atoms. B(1) is bonded in a 7-coordinate geometry to two equivalent Ni(2), four equivalent Ni(1), and one B(1) atom.
Ba2(Ni3B2)3 crystallizes in the trigonal R-3c space group. Ba(1) is bonded in a 6-coordinate geometry to three equivalent Ni(1) and three equivalent Ni(2) atoms. All Ba(1)-Ni(1) bond lengths are 3.10 Å. All Ba(1)-Ni(2) bond lengths are 2.97 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 4-coordinate geometry to one Ba(1) and four equivalent B(1) atoms. There are a spread of Ni(1)-B(1) bond distances ranging from 2.08-2.19 Å. In the second Ni site, Ni(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1) and four equivalent B(1) atoms. There are two shorter (2.08 Å) and two longer (2.11 Å) Ni(2)-B(1) bond lengths. B(1) is bonded in a 7-coordinate geometry to two equivalent Ni(2), four equivalent Ni(1), and one B(1) atom. The B(1)-B(1) bond length is 1.74 Å.