Sr2InAl3 crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 12-coordinate geometry to three equivalent In(1), three equivalent Al(1), three equivalent Al(2), and three equivalent Al(3) atoms. In the second Sr site, Sr(2) is bonded in a 12-coordinate geometry to three equivalent In(1), three equivalent Al(1), three equivalent Al(2), and three equivalent Al(3) atoms. In(1) is bonded in a 10-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), one Al(1), one Al(3), and two equivalent Al(2) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), one In(1), one Al(2), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a 10-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), two equivalent In(1), one Al(1), and one Al(3) atom. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), one In(1), one Al(2), and two equivalent Al(1) atoms.
Sr2InAl3 crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 12-coordinate geometry to three equivalent In(1), three equivalent Al(1), three equivalent Al(2), and three equivalent Al(3) atoms. There is one shorter (3.50 Å) and two longer (3.61 Å) Sr(1)-In(1) bond lengths. There are two shorter (3.31 Å) and one longer (3.45 Å) Sr(1)-Al(1) bond length. There are two shorter (3.28 Å) and one longer (3.53 Å) Sr(1)-Al(2) bond length. There is one shorter (3.47 Å) and two longer (3.60 Å) Sr(1)-Al(3) bond lengths. In the second Sr site, Sr(2) is bonded in a 12-coordinate geometry to three equivalent In(1), three equivalent Al(1), three equivalent Al(2), and three equivalent Al(3) atoms. There are two shorter (3.31 Å) and one longer (3.43 Å) Sr(2)-In(1) bond length. There is one shorter (3.38 Å) and two longer (3.70 Å) Sr(2)-Al(1) bond lengths. There is one shorter (3.49 Å) and two longer (3.62 Å) Sr(2)-Al(2) bond lengths. There are two shorter (3.33 Å) and one longer (3.45 Å) Sr(2)-Al(3) bond length. In(1) is bonded in a 10-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), one Al(1), one Al(3), and two equivalent Al(2) atoms. The In(1)-Al(1) bond length is 2.88 Å. The In(1)-Al(3) bond length is 3.02 Å. Both In(1)-Al(2) bond lengths are 2.86 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), one In(1), one Al(2), and two equivalent Al(3) atoms. The Al(1)-Al(2) bond length is 2.86 Å. Both Al(1)-Al(3) bond lengths are 2.80 Å. In the second Al site, Al(2) is bonded in a 10-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), two equivalent In(1), one Al(1), and one Al(3) atom. The Al(2)-Al(3) bond length is 2.74 Å. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), one In(1), one Al(2), and two equivalent Al(1) atoms.