Y3(OsAl3)4 crystallizes in the hexagonal P6_3/mmc space group. Y(1) is bonded in a 15-coordinate geometry to four equivalent Os(1), one Al(4), two equivalent Al(1), two equivalent Al(3), and six equivalent Al(2) atoms. There are two inequivalent Os sites. In the first Os site, Os(2) is bonded in a body-centered cubic geometry to two equivalent Al(4) and six equivalent Al(2) atoms. In the second Os site, Os(1) is bonded in a 8-coordinate geometry to four equivalent Y(1), two equivalent Al(1), two equivalent Al(3), and four equivalent Al(2) atoms. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted trigonal planar geometry to three equivalent Y(1) and three equivalent Os(1) atoms. In the second Al site, Al(2) is bonded in a 3-coordinate geometry to three equivalent Y(1), one Os(2), and two equivalent Os(1) atoms. In the third Al site, Al(3) is bonded in a 2-coordinate geometry to two equivalent Y(1) and two equivalent Os(1) atoms. In the fourth Al site, Al(4) is bonded in a distorted linear geometry to three equivalent Y(1) and two equivalent Os(2) atoms.
Y3(OsAl3)4 crystallizes in the hexagonal P6_3/mmc space group. Y(1) is bonded in a 15-coordinate geometry to four equivalent Os(1), one Al(4), two equivalent Al(1), two equivalent Al(3), and six equivalent Al(2) atoms. All Y(1)-Os(1) bond lengths are 3.35 Å. The Y(1)-Al(4) bond length is 2.94 Å. Both Y(1)-Al(1) bond lengths are 3.12 Å. Both Y(1)-Al(3) bond lengths are 3.03 Å. There are two shorter (3.13 Å) and four longer (3.21 Å) Y(1)-Al(2) bond lengths. There are two inequivalent Os sites. In the first Os site, Os(2) is bonded in a body-centered cubic geometry to two equivalent Al(4) and six equivalent Al(2) atoms. Both Os(2)-Al(4) bond lengths are 2.38 Å. All Os(2)-Al(2) bond lengths are 2.58 Å. In the second Os site, Os(1) is bonded in a 8-coordinate geometry to four equivalent Y(1), two equivalent Al(1), two equivalent Al(3), and four equivalent Al(2) atoms. Both Os(1)-Al(1) bond lengths are 2.54 Å. Both Os(1)-Al(3) bond lengths are 2.56 Å. All Os(1)-Al(2) bond lengths are 2.66 Å. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted trigonal planar geometry to three equivalent Y(1) and three equivalent Os(1) atoms. In the second Al site, Al(2) is bonded in a 3-coordinate geometry to three equivalent Y(1), one Os(2), and two equivalent Os(1) atoms. In the third Al site, Al(3) is bonded in a 2-coordinate geometry to two equivalent Y(1) and two equivalent Os(1) atoms. In the fourth Al site, Al(4) is bonded in a distorted linear geometry to three equivalent Y(1) and two equivalent Os(2) atoms.