Al13Ru4 crystallizes in the monoclinic C2/m space group. There are five inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 11-coordinate geometry to one Al(10), one Al(3), one Al(5), two equivalent Al(13), two equivalent Al(14), two equivalent Al(15), and two equivalent Al(6) atoms. In the second Ru site, Ru(2) is bonded in a 10-coordinate geometry to one Al(1), one Al(5), one Al(8), one Al(9), two equivalent Al(13), two equivalent Al(14), and two equivalent Al(15) atoms. In the third Ru site, Ru(3) is bonded in a 10-coordinate geometry to one Al(10), one Al(7), two equivalent Al(11), two equivalent Al(12), two equivalent Al(2), and two equivalent Al(3) atoms. In the fourth Ru site, Ru(4) is bonded in a 10-coordinate geometry to one Al(7), one Al(9), two equivalent Al(11), two equivalent Al(12), two equivalent Al(2), and two equivalent Al(8) atoms. In the fifth Ru site, Ru(5) is bonded in a 9-coordinate geometry to one Al(10), one Al(11), one Al(12), one Al(13), one Al(14), one Al(15), one Al(4), one Al(6), and one Al(9) atom. There are fifteen inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted linear geometry to two equivalent Ru(2) atoms. In the second Al site, Al(2) is bonded in a 4-coordinate geometry to two equivalent Ru(3) and two equivalent Ru(4) atoms. In the third Al site, Al(3) is bonded in a 3-coordinate geometry to one Ru(1), two equivalent Ru(3), and one Al(10) atom. In the fourth Al site, Al(4) is bonded in a linear geometry to two equivalent Ru(5) atoms. In the fifth Al site, Al(5) is bonded in a distorted bent 150 degrees geometry to one Ru(1), one Ru(2), one Al(6), and one Al(9) atom. In the sixth Al site, Al(6) is bonded in a 11-coordinate geometry to two equivalent Ru(1), two equivalent Ru(5), one Al(10), one Al(5), one Al(6), two equivalent Al(14), and two equivalent Al(15) atoms. In the seventh Al site, Al(7) is bonded in a distorted bent 150 degrees geometry to one Ru(3), one Ru(4), one Al(10), and one Al(9) atom. In the eighth Al site, Al(8) is bonded in a 3-coordinate geometry to one Ru(2), two equivalent Ru(4), and one Al(9) atom. In the ninth Al site, Al(9) is bonded in a 11-coordinate geometry to one Ru(2), one Ru(4), two equivalent Ru(5), one Al(5), one Al(7), one Al(8), two equivalent Al(11), and two equivalent Al(13) atoms. In the tenth Al site, Al(10) is bonded in a 11-coordinate geometry to one Ru(1), one Ru(3), two equivalent Ru(5), one Al(3), one Al(6), one Al(7), two equivalent Al(12), and two equivalent Al(14) atoms. In the eleventh Al site, Al(11) is bonded in a 3-coordinate geometry to one Ru(3), one Ru(4), one Ru(5), and one Al(9) atom. In the twelfth Al site, Al(12) is bonded in a 3-coordinate geometry to one Ru(3), one Ru(4), one Ru(5), and one Al(10) atom. In the thirteenth Al site, Al(13) is bonded in a 3-coordinate geometry to one Ru(1), one Ru(2), one Ru(5), and one Al(9) atom. In the fourteenth Al site, Al(14) is bonded in a 3-coordinate geometry to one Ru(1), one Ru(2), one Ru(5), one Al(10), and one Al(6) atom. In the fifteenth Al site, Al(15) is bonded in a 2-coordinate geometry to one Ru(1), one Ru(2), one Ru(5), and one Al(6) atom.
Al13Ru4 crystallizes in the monoclinic C2/m space group. There are five inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 11-coordinate geometry to one Al(10), one Al(3), one Al(5), two equivalent Al(13), two equivalent Al(14), two equivalent Al(15), and two equivalent Al(6) atoms. The Ru(1)-Al(10) bond length is 2.84 Å. The Ru(1)-Al(3) bond length is 2.57 Å. The Ru(1)-Al(5) bond length is 2.62 Å. Both Ru(1)-Al(13) bond lengths are 2.53 Å. Both Ru(1)-Al(14) bond lengths are 2.61 Å. Both Ru(1)-Al(15) bond lengths are 2.81 Å. There is one shorter (2.58 Å) and one longer (2.68 Å) Ru(1)-Al(6) bond length. In the second Ru site, Ru(2) is bonded in a 10-coordinate geometry to one Al(1), one Al(5), one Al(8), one Al(9), two equivalent Al(13), two equivalent Al(14), and two equivalent Al(15) atoms. The Ru(2)-Al(1) bond length is 2.54 Å. The Ru(2)-Al(5) bond length is 2.53 Å. The Ru(2)-Al(8) bond length is 2.52 Å. The Ru(2)-Al(9) bond length is 2.70 Å. Both Ru(2)-Al(13) bond lengths are 2.72 Å. Both Ru(2)-Al(14) bond lengths are 2.50 Å. Both Ru(2)-Al(15) bond lengths are 2.52 Å. In the third Ru site, Ru(3) is bonded in a 10-coordinate geometry to one Al(10), one Al(7), two equivalent Al(11), two equivalent Al(12), two equivalent Al(2), and two equivalent Al(3) atoms. The Ru(3)-Al(10) bond length is 2.52 Å. The Ru(3)-Al(7) bond length is 2.50 Å. Both Ru(3)-Al(11) bond lengths are 2.54 Å. Both Ru(3)-Al(12) bond lengths are 2.78 Å. Both Ru(3)-Al(2) bond lengths are 2.54 Å. There is one shorter (2.51 Å) and one longer (2.73 Å) Ru(3)-Al(3) bond length. In the fourth Ru site, Ru(4) is bonded in a 10-coordinate geometry to one Al(7), one Al(9), two equivalent Al(11), two equivalent Al(12), two equivalent Al(2), and two equivalent Al(8) atoms. The Ru(4)-Al(7) bond length is 2.48 Å. The Ru(4)-Al(9) bond length is 2.61 Å. Both Ru(4)-Al(11) bond lengths are 2.74 Å. Both Ru(4)-Al(12) bond lengths are 2.53 Å. Both Ru(4)-Al(2) bond lengths are 2.54 Å. There is one shorter (2.52 Å) and one longer (2.66 Å) Ru(4)-Al(8) bond length. In the fifth Ru site, Ru(5) is bonded in a 9-coordinate geometry to one Al(10), one Al(11), one Al(12), one Al(13), one Al(14), one Al(15), one Al(4), one Al(6), and one Al(9) atom. The Ru(5)-Al(10) bond length is 2.58 Å. The Ru(5)-Al(11) bond length is 2.58 Å. The Ru(5)-Al(12) bond length is 2.58 Å. The Ru(5)-Al(13) bond length is 2.61 Å. The Ru(5)-Al(14) bond length is 2.66 Å. The Ru(5)-Al(15) bond length is 2.53 Å. The Ru(5)-Al(4) bond length is 2.43 Å. The Ru(5)-Al(6) bond length is 2.66 Å. The Ru(5)-Al(9) bond length is 2.57 Å. There are fifteen inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted linear geometry to two equivalent Ru(2) atoms. In the second Al site, Al(2) is bonded in a 4-coordinate geometry to two equivalent Ru(3) and two equivalent Ru(4) atoms. In the third Al site, Al(3) is bonded in a 3-coordinate geometry to one Ru(1), two equivalent Ru(3), and one Al(10) atom. The Al(3)-Al(10) bond length is 2.57 Å. In the fourth Al site, Al(4) is bonded in a linear geometry to two equivalent Ru(5) atoms. In the fifth Al site, Al(5) is bonded in a distorted bent 150 degrees geometry to one Ru(1), one Ru(2), one Al(6), and one Al(9) atom. The Al(5)-Al(6) bond length is 2.76 Å. The Al(5)-Al(9) bond length is 2.80 Å. In the sixth Al site, Al(6) is bonded in a 11-coordinate geometry to two equivalent Ru(1), two equivalent Ru(5), one Al(10), one Al(5), one Al(6), two equivalent Al(14), and two equivalent Al(15) atoms. The Al(6)-Al(10) bond length is 2.56 Å. The Al(6)-Al(6) bond length is 2.55 Å. Both Al(6)-Al(14) bond lengths are 2.78 Å. Both Al(6)-Al(15) bond lengths are 2.69 Å. In the seventh Al site, Al(7) is bonded in a distorted bent 150 degrees geometry to one Ru(3), one Ru(4), one Al(10), and one Al(9) atom. The Al(7)-Al(10) bond length is 2.73 Å. The Al(7)-Al(9) bond length is 2.82 Å. In the eighth Al site, Al(8) is bonded in a 3-coordinate geometry to one Ru(2), two equivalent Ru(4), and one Al(9) atom. The Al(8)-Al(9) bond length is 2.58 Å. In the ninth Al site, Al(9) is bonded in a 11-coordinate geometry to one Ru(2), one Ru(4), two equivalent Ru(5), one Al(5), one Al(7), one Al(8), two equivalent Al(11), and two equivalent Al(13) atoms. Both Al(9)-Al(11) bond lengths are 2.71 Å. Both Al(9)-Al(13) bond lengths are 2.69 Å. In the tenth Al site, Al(10) is bonded in a 11-coordinate geometry to one Ru(1), one Ru(3), two equivalent Ru(5), one Al(3), one Al(6), one Al(7), two equivalent Al(12), and two equivalent Al(14) atoms. Both Al(10)-Al(12) bond lengths are 2.68 Å. Both Al(10)-Al(14) bond lengths are 2.67 Å. In the eleventh Al site, Al(11) is bonded in a 3-coordinate geometry to one Ru(3), one Ru(4), one Ru(5), and one Al(9) atom. In the twelfth Al site, Al(12) is bonded in a 3-coordinate geometry to one Ru(3), one Ru(4), one Ru(5), and one Al(10) atom. In the thirteenth Al site, Al(13) is bonded in a 3-coordinate geometry to one Ru(1), one Ru(2), one Ru(5), and one Al(9) atom. In the fourteenth Al site, Al(14) is bonded in a 3-coordinate geometry to one Ru(1), one Ru(2), one Ru(5), one Al(10), and one Al(6) atom. In the fifteenth Al site, Al(15) is bonded in a 2-coordinate geometry to one Ru(1), one Ru(2), one Ru(5), and one Al(6) atom.