Pr(OsAl5)2 crystallizes in the orthorhombic Cmcm space group. Pr(1) is bonded in a 20-coordinate geometry to four equivalent Os(1), two equivalent Al(1), two equivalent Al(5), four equivalent Al(2), four equivalent Al(3), and four equivalent Al(4) atoms. Os(1) is bonded in a 10-coordinate geometry to two equivalent Pr(1), two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), two equivalent Al(4), and two equivalent Al(5) atoms. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded in a 2-coordinate geometry to one Pr(1) and two equivalent Os(1) atoms. In the second Al site, Al(2) is bonded in a distorted linear geometry to two equivalent Pr(1) and two equivalent Os(1) atoms. In the third Al site, Al(3) is bonded in a 2-coordinate geometry to two equivalent Pr(1) and two equivalent Os(1) atoms. In the fourth Al site, Al(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Pr(1) and two equivalent Os(1) atoms. In the fifth Al site, Al(5) is bonded in a 2-coordinate geometry to one Pr(1) and two equivalent Os(1) atoms.
Pr(OsAl5)2 crystallizes in the orthorhombic Cmcm space group. Pr(1) is bonded in a 20-coordinate geometry to four equivalent Os(1), two equivalent Al(1), two equivalent Al(5), four equivalent Al(2), four equivalent Al(3), and four equivalent Al(4) atoms. All Pr(1)-Os(1) bond lengths are 3.47 Å. Both Pr(1)-Al(1) bond lengths are 3.17 Å. Both Pr(1)-Al(5) bond lengths are 3.20 Å. All Pr(1)-Al(2) bond lengths are 3.34 Å. There are two shorter (3.23 Å) and two longer (3.25 Å) Pr(1)-Al(3) bond lengths. There are two shorter (3.21 Å) and two longer (3.65 Å) Pr(1)-Al(4) bond lengths. Os(1) is bonded in a 10-coordinate geometry to two equivalent Pr(1), two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), two equivalent Al(4), and two equivalent Al(5) atoms. Both Os(1)-Al(1) bond lengths are 2.66 Å. Both Os(1)-Al(2) bond lengths are 2.57 Å. Both Os(1)-Al(3) bond lengths are 2.62 Å. Both Os(1)-Al(4) bond lengths are 2.59 Å. Both Os(1)-Al(5) bond lengths are 2.75 Å. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded in a 2-coordinate geometry to one Pr(1) and two equivalent Os(1) atoms. In the second Al site, Al(2) is bonded in a distorted linear geometry to two equivalent Pr(1) and two equivalent Os(1) atoms. In the third Al site, Al(3) is bonded in a 2-coordinate geometry to two equivalent Pr(1) and two equivalent Os(1) atoms. In the fourth Al site, Al(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Pr(1) and two equivalent Os(1) atoms. In the fifth Al site, Al(5) is bonded in a 2-coordinate geometry to one Pr(1) and two equivalent Os(1) atoms.