Mg17Al11Sn is gamma-brass-derived structured and crystallizes in the monoclinic Cm space group. There are eleven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to one Mg(3), one Mg(5), two equivalent Mg(7), two equivalent Al(2), two equivalent Al(4), and two equivalent Al(6) atoms. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to one Mg(4), two equivalent Mg(10), two equivalent Mg(6), two equivalent Mg(7), one Al(1), two equivalent Al(2), and two equivalent Al(4) atoms. In the third Mg site, Mg(3) is bonded in a 16-coordinate geometry to one Mg(1), one Mg(4), two equivalent Mg(9), one Al(1), two equivalent Al(2), two equivalent Al(3), two equivalent Al(4), two equivalent Al(5), two equivalent Al(6), and one Sn(1) atom. In the fourth Mg site, Mg(4) is bonded in a 10-coordinate geometry to one Mg(2), one Mg(3), two equivalent Mg(8), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(5) atoms. In the fifth Mg site, Mg(5) is bonded in a 12-coordinate geometry to one Mg(1), two equivalent Mg(11), two equivalent Mg(6), two equivalent Mg(8), two equivalent Al(2), two equivalent Al(3), and one Sn(1) atom. In the sixth Mg site, Mg(6) is bonded in a 4-coordinate geometry to one Mg(10), one Mg(11), one Mg(2), one Mg(5), one Mg(7), one Mg(8), one Mg(9), one Al(2), one Al(5), one Al(6), and one Sn(1) atom. In the seventh Mg site, Mg(7) is bonded in a 12-coordinate geometry to one Mg(1), one Mg(11), one Mg(2), one Mg(6), one Mg(8), two equivalent Mg(10), one Al(1), one Al(3), one Al(4), one Al(5), and one Al(6) atom. In the eighth Mg site, Mg(8) is bonded in a 12-coordinate geometry to one Mg(10), one Mg(4), one Mg(5), one Mg(6), one Mg(7), two equivalent Mg(11), one Al(3), one Al(4), one Al(5), one Al(6), and one Sn(1) atom. In the ninth Mg site, Mg(9) is bonded in a 10-coordinate geometry to one Mg(10), one Mg(11), one Mg(3), one Mg(6), one Al(1), one Al(3), one Al(4), one Al(5), one Al(6), and one Sn(1) atom. In the tenth Mg site, Mg(10) is bonded in a 12-coordinate geometry to one Mg(11), one Mg(2), one Mg(6), one Mg(8), one Mg(9), two equivalent Mg(7), one Al(2), one Al(3), one Al(4), and two equivalent Al(5) atoms. In the eleventh Mg site, Mg(11) is bonded in a 12-coordinate geometry to one Mg(10), one Mg(5), one Mg(6), one Mg(7), one Mg(9), two equivalent Mg(8), one Al(2), one Al(3), one Al(4), and two equivalent Al(6) atoms. There are six inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to one Mg(2), one Mg(3), two equivalent Mg(7), two equivalent Mg(9), two equivalent Al(3), and one Sn(1) atom. In the second Al site, Al(2) is bonded in a 11-coordinate geometry to one Mg(1), one Mg(10), one Mg(11), one Mg(2), one Mg(3), one Mg(4), one Mg(5), one Mg(6), one Al(2), one Al(5), and one Al(6) atom. In the third Al site, Al(3) is bonded in a distorted q6 geometry to one Mg(10), one Mg(11), one Mg(3), one Mg(4), one Mg(5), one Mg(7), one Mg(8), one Mg(9), one Al(1), one Al(3), and one Al(5) atom. In the fourth Al site, Al(4) is bonded in a 11-coordinate geometry to one Mg(1), one Mg(10), one Mg(11), one Mg(2), one Mg(3), one Mg(7), one Mg(8), one Mg(9), one Al(4), one Al(6), and one Sn(1) atom. In the fifth Al site, Al(5) is bonded in a 11-coordinate geometry to one Mg(3), one Mg(4), one Mg(6), one Mg(7), one Mg(8), one Mg(9), two equivalent Mg(10), one Al(2), one Al(3), and one Al(6) atom. In the sixth Al site, Al(6) is bonded in a 11-coordinate geometry to one Mg(1), one Mg(3), one Mg(6), one Mg(7), one Mg(8), one Mg(9), two equivalent Mg(11), one Al(2), one Al(4), and one Al(5) atom. Sn(1) is bonded in a 11-coordinate geometry to one Mg(3), one Mg(5), two equivalent Mg(6), two equivalent Mg(8), two equivalent Mg(9), one Al(1), and two equivalent Al(4) atoms.
Mg17Al11Sn is gamma-brass-derived structured and crystallizes in the monoclinic Cm space group. There are eleven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to one Mg(3), one Mg(5), two equivalent Mg(7), two equivalent Al(2), two equivalent Al(4), and two equivalent Al(6) atoms. The Mg(1)-Mg(3) bond length is 3.13 Å. The Mg(1)-Mg(5) bond length is 3.04 Å. Both Mg(1)-Mg(7) bond lengths are 3.08 Å. Both Mg(1)-Al(2) bond lengths are 3.13 Å. Both Mg(1)-Al(4) bond lengths are 3.04 Å. Both Mg(1)-Al(6) bond lengths are 3.10 Å. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to one Mg(4), two equivalent Mg(10), two equivalent Mg(6), two equivalent Mg(7), one Al(1), two equivalent Al(2), and two equivalent Al(4) atoms. The Mg(2)-Mg(4) bond length is 3.08 Å. Both Mg(2)-Mg(10) bond lengths are 3.17 Å. Both Mg(2)-Mg(6) bond lengths are 3.17 Å. Both Mg(2)-Mg(7) bond lengths are 3.21 Å. The Mg(2)-Al(1) bond length is 2.90 Å. Both Mg(2)-Al(2) bond lengths are 3.20 Å. Both Mg(2)-Al(4) bond lengths are 2.99 Å. In the third Mg site, Mg(3) is bonded in a 16-coordinate geometry to one Mg(1), one Mg(4), two equivalent Mg(9), one Al(1), two equivalent Al(2), two equivalent Al(3), two equivalent Al(4), two equivalent Al(5), two equivalent Al(6), and one Sn(1) atom. The Mg(3)-Mg(4) bond length is 3.09 Å. Both Mg(3)-Mg(9) bond lengths are 3.21 Å. The Mg(3)-Al(1) bond length is 3.31 Å. Both Mg(3)-Al(2) bond lengths are 3.20 Å. Both Mg(3)-Al(3) bond lengths are 3.19 Å. Both Mg(3)-Al(4) bond lengths are 3.27 Å. Both Mg(3)-Al(5) bond lengths are 3.19 Å. Both Mg(3)-Al(6) bond lengths are 3.21 Å. The Mg(3)-Sn(1) bond length is 3.34 Å. In the fourth Mg site, Mg(4) is bonded in a 10-coordinate geometry to one Mg(2), one Mg(3), two equivalent Mg(8), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(5) atoms. Both Mg(4)-Mg(8) bond lengths are 3.10 Å. Both Mg(4)-Al(2) bond lengths are 3.08 Å. Both Mg(4)-Al(3) bond lengths are 3.10 Å. Both Mg(4)-Al(5) bond lengths are 3.09 Å. In the fifth Mg site, Mg(5) is bonded in a 12-coordinate geometry to one Mg(1), two equivalent Mg(11), two equivalent Mg(6), two equivalent Mg(8), two equivalent Al(2), two equivalent Al(3), and one Sn(1) atom. Both Mg(5)-Mg(11) bond lengths are 3.17 Å. Both Mg(5)-Mg(6) bond lengths are 3.23 Å. Both Mg(5)-Mg(8) bond lengths are 3.28 Å. Both Mg(5)-Al(2) bond lengths are 3.13 Å. Both Mg(5)-Al(3) bond lengths are 2.98 Å. The Mg(5)-Sn(1) bond length is 2.98 Å. In the sixth Mg site, Mg(6) is bonded in a 4-coordinate geometry to one Mg(10), one Mg(11), one Mg(2), one Mg(5), one Mg(7), one Mg(8), one Mg(9), one Al(2), one Al(5), one Al(6), and one Sn(1) atom. The Mg(6)-Mg(10) bond length is 3.13 Å. The Mg(6)-Mg(11) bond length is 3.17 Å. The Mg(6)-Mg(7) bond length is 3.17 Å. The Mg(6)-Mg(8) bond length is 3.23 Å. The Mg(6)-Mg(9) bond length is 3.14 Å. The Mg(6)-Al(2) bond length is 2.92 Å. The Mg(6)-Al(5) bond length is 2.96 Å. The Mg(6)-Al(6) bond length is 2.96 Å. The Mg(6)-Sn(1) bond length is 3.22 Å. In the seventh Mg site, Mg(7) is bonded in a 12-coordinate geometry to one Mg(1), one Mg(11), one Mg(2), one Mg(6), one Mg(8), two equivalent Mg(10), one Al(1), one Al(3), one Al(4), one Al(5), and one Al(6) atom. The Mg(7)-Mg(11) bond length is 3.19 Å. The Mg(7)-Mg(8) bond length is 3.10 Å. There is one shorter (3.17 Å) and one longer (3.18 Å) Mg(7)-Mg(10) bond length. The Mg(7)-Al(1) bond length is 2.92 Å. The Mg(7)-Al(3) bond length is 3.02 Å. The Mg(7)-Al(4) bond length is 3.16 Å. The Mg(7)-Al(5) bond length is 2.92 Å. The Mg(7)-Al(6) bond length is 3.22 Å. In the eighth Mg site, Mg(8) is bonded in a 12-coordinate geometry to one Mg(10), one Mg(4), one Mg(5), one Mg(6), one Mg(7), two equivalent Mg(11), one Al(3), one Al(4), one Al(5), one Al(6), and one Sn(1) atom. The Mg(8)-Mg(10) bond length is 3.15 Å. There is one shorter (3.16 Å) and one longer (3.17 Å) Mg(8)-Mg(11) bond length. The Mg(8)-Al(3) bond length is 3.16 Å. The Mg(8)-Al(4) bond length is 3.10 Å. The Mg(8)-Al(5) bond length is 3.14 Å. The Mg(8)-Al(6) bond length is 2.92 Å. The Mg(8)-Sn(1) bond length is 3.06 Å. In the ninth Mg site, Mg(9) is bonded in a 10-coordinate geometry to one Mg(10), one Mg(11), one Mg(3), one Mg(6), one Al(1), one Al(3), one Al(4), one Al(5), one Al(6), and one Sn(1) atom. The Mg(9)-Mg(10) bond length is 3.03 Å. The Mg(9)-Mg(11) bond length is 3.06 Å. The Mg(9)-Al(1) bond length is 3.20 Å. The Mg(9)-Al(3) bond length is 3.09 Å. The Mg(9)-Al(4) bond length is 3.18 Å. The Mg(9)-Al(5) bond length is 3.11 Å. The Mg(9)-Al(6) bond length is 3.11 Å. The Mg(9)-Sn(1) bond length is 3.19 Å. In the tenth Mg site, Mg(10) is bonded in a 12-coordinate geometry to one Mg(11), one Mg(2), one Mg(6), one Mg(8), one Mg(9), two equivalent Mg(7), one Al(2), one Al(3), one Al(4), and two equivalent Al(5) atoms. The Mg(10)-Mg(11) bond length is 3.14 Å. The Mg(10)-Al(2) bond length is 3.01 Å. The Mg(10)-Al(3) bond length is 3.21 Å. The Mg(10)-Al(4) bond length is 2.89 Å. There is one shorter (3.00 Å) and one longer (3.24 Å) Mg(10)-Al(5) bond length. In the eleventh Mg site, Mg(11) is bonded in a 12-coordinate geometry to one Mg(10), one Mg(5), one Mg(6), one Mg(7), one Mg(9), two equivalent Mg(8), one Al(2), one Al(3), one Al(4), and two equivalent Al(6) atoms. The Mg(11)-Al(2) bond length is 3.00 Å. The Mg(11)-Al(3) bond length is 2.93 Å. The Mg(11)-Al(4) bond length is 3.18 Å. There is one shorter (3.00 Å) and one longer (3.22 Å) Mg(11)-Al(6) bond length. There are six inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to one Mg(2), one Mg(3), two equivalent Mg(7), two equivalent Mg(9), two equivalent Al(3), and one Sn(1) atom. Both Al(1)-Al(3) bond lengths are 2.73 Å. The Al(1)-Sn(1) bond length is 2.82 Å. In the second Al site, Al(2) is bonded in a 11-coordinate geometry to one Mg(1), one Mg(10), one Mg(11), one Mg(2), one Mg(3), one Mg(4), one Mg(5), one Mg(6), one Al(2), one Al(5), and one Al(6) atom. The Al(2)-Al(2) bond length is 2.71 Å. The Al(2)-Al(5) bond length is 2.76 Å. The Al(2)-Al(6) bond length is 2.77 Å. In the third Al site, Al(3) is bonded in a distorted q6 geometry to one Mg(10), one Mg(11), one Mg(3), one Mg(4), one Mg(5), one Mg(7), one Mg(8), one Mg(9), one Al(1), one Al(3), and one Al(5) atom. The Al(3)-Al(3) bond length is 2.79 Å. The Al(3)-Al(5) bond length is 2.69 Å. In the fourth Al site, Al(4) is bonded in a 11-coordinate geometry to one Mg(1), one Mg(10), one Mg(11), one Mg(2), one Mg(3), one Mg(7), one Mg(8), one Mg(9), one Al(4), one Al(6), and one Sn(1) atom. The Al(4)-Al(4) bond length is 2.82 Å. The Al(4)-Al(6) bond length is 2.69 Å. The Al(4)-Sn(1) bond length is 2.90 Å. In the fifth Al site, Al(5) is bonded in a 11-coordinate geometry to one Mg(3), one Mg(4), one Mg(6), one Mg(7), one Mg(8), one Mg(9), two equivalent Mg(10), one Al(2), one Al(3), and one Al(6) atom. The Al(5)-Al(6) bond length is 2.75 Å. In the sixth Al site, Al(6) is bonded in a 11-coordinate geometry to one Mg(1), one Mg(3), one Mg(6), one Mg(7), one Mg(8), one Mg(9), two equivalent Mg(11), one Al(2), one Al(4), and one Al(5) atom. Sn(1) is bonded in a 11-coordinate geometry to one Mg(3), one Mg(5), two equivalent Mg(6), two equivalent Mg(8), two equivalent Mg(9), one Al(1), and two equivalent Al(4) atoms.