Ba2In3Al crystallizes in the monoclinic Cm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 12-coordinate geometry to three equivalent In(1), three equivalent In(2), three equivalent In(3), and three equivalent Al(1) atoms. In the second Ba site, Ba(2) is bonded in a 12-coordinate geometry to three equivalent In(1), three equivalent In(2), three equivalent In(3), and three equivalent Al(1) atoms. There are three inequivalent In sites. In the first In site, In(1) is bonded in a 10-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), one In(2), two equivalent In(3), and one Al(1) atom. In the second In site, In(2) is bonded in a 10-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), one In(1), one In(3), and two equivalent Al(1) atoms. In the third In site, In(3) is bonded in a 10-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), one In(2), two equivalent In(1), and one Al(1) atom. Al(1) is bonded in a 10-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), one In(1), one In(3), and two equivalent In(2) atoms.
Ba2In3Al crystallizes in the monoclinic Cm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 12-coordinate geometry to three equivalent In(1), three equivalent In(2), three equivalent In(3), and three equivalent Al(1) atoms. There are two shorter (3.54 Å) and one longer (3.71 Å) Ba(1)-In(1) bond length. There are two shorter (3.57 Å) and one longer (3.62 Å) Ba(1)-In(2) bond length. There is one shorter (3.66 Å) and two longer (3.95 Å) Ba(1)-In(3) bond lengths. There is one shorter (3.63 Å) and two longer (3.93 Å) Ba(1)-Al(1) bond lengths. In the second Ba site, Ba(2) is bonded in a 12-coordinate geometry to three equivalent In(1), three equivalent In(2), three equivalent In(3), and three equivalent Al(1) atoms. There is one shorter (3.75 Å) and two longer (3.85 Å) Ba(2)-In(1) bond lengths. There is one shorter (3.63 Å) and two longer (3.93 Å) Ba(2)-In(2) bond lengths. There are two shorter (3.51 Å) and one longer (3.71 Å) Ba(2)-In(3) bond length. There are two shorter (3.54 Å) and one longer (3.72 Å) Ba(2)-Al(1) bond length. There are three inequivalent In sites. In the first In site, In(1) is bonded in a 10-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), one In(2), two equivalent In(3), and one Al(1) atom. The In(1)-In(2) bond length is 3.17 Å. Both In(1)-In(3) bond lengths are 3.08 Å. The In(1)-Al(1) bond length is 2.91 Å. In the second In site, In(2) is bonded in a 10-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), one In(1), one In(3), and two equivalent Al(1) atoms. The In(2)-In(3) bond length is 3.08 Å. Both In(2)-Al(1) bond lengths are 3.00 Å. In the third In site, In(3) is bonded in a 10-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), one In(2), two equivalent In(1), and one Al(1) atom. The In(3)-Al(1) bond length is 3.02 Å. Al(1) is bonded in a 10-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), one In(1), one In(3), and two equivalent In(2) atoms.