MgLaFe2Al7 crystallizes in the orthorhombic Pbam space group. Mg(1) is bonded in a 13-coordinate geometry to one Fe(1), two equivalent Fe(2), two equivalent Al(1), two equivalent Al(2), two equivalent Al(5), two equivalent Al(7), and two equivalent Al(8) atoms. La(1) is bonded in a 13-coordinate geometry to one Al(3), two equivalent Al(2), two equivalent Al(4), two equivalent Al(5), two equivalent Al(6), two equivalent Al(7), and two equivalent Al(8) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 9-coordinate geometry to one Mg(1), one Al(3), one Al(6), two equivalent Al(2), two equivalent Al(4), and two equivalent Al(7) atoms. In the second Fe site, Fe(2) is bonded in a 9-coordinate geometry to two equivalent Mg(1), one Al(6), two equivalent Al(1), two equivalent Al(5), and two equivalent Al(8) atoms. There are eight inequivalent Al sites. In the first Al site, Al(8) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent La(1), two equivalent Fe(2), one Al(1), one Al(4), one Al(5), one Al(7), and two equivalent Al(6) atoms. In the second Al site, Al(1) is bonded to four equivalent Mg(1), four equivalent Fe(2), two equivalent Al(5), and two equivalent Al(8) atoms to form distorted face-sharing AlMg4Al4Fe4 cuboctahedra. In the third Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent La(1), two equivalent Fe(1), one Al(5), one Al(7), two equivalent Al(3), and two equivalent Al(4) atoms. In the fourth Al site, Al(3) is bonded in a distorted linear geometry to two equivalent La(1), two equivalent Fe(1), four equivalent Al(2), and four equivalent Al(4) atoms. In the fifth Al site, Al(4) is bonded in a 12-coordinate geometry to two equivalent La(1), two equivalent Fe(1), one Al(7), one Al(8), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(6) atoms. In the sixth Al site, Al(5) is bonded in a 11-coordinate geometry to two equivalent Mg(1), two equivalent La(1), two equivalent Fe(2), one Al(1), one Al(2), one Al(8), and two equivalent Al(6) atoms. In the seventh Al site, Al(6) is bonded in a distorted linear geometry to two equivalent La(1), one Fe(1), one Fe(2), two equivalent Al(4), two equivalent Al(5), and two equivalent Al(8) atoms. In the eighth Al site, Al(7) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent La(1), two equivalent Fe(1), one Al(2), one Al(4), and one Al(8) atom.
MgLaFe2Al7 crystallizes in the orthorhombic Pbam space group. Mg(1) is bonded in a 13-coordinate geometry to one Fe(1), two equivalent Fe(2), two equivalent Al(1), two equivalent Al(2), two equivalent Al(5), two equivalent Al(7), and two equivalent Al(8) atoms. The Mg(1)-Fe(1) bond length is 2.62 Å. There is one shorter (2.66 Å) and one longer (2.69 Å) Mg(1)-Fe(2) bond length. Both Mg(1)-Al(1) bond lengths are 3.04 Å. Both Mg(1)-Al(2) bond lengths are 3.05 Å. Both Mg(1)-Al(5) bond lengths are 3.15 Å. Both Mg(1)-Al(7) bond lengths are 3.02 Å. Both Mg(1)-Al(8) bond lengths are 3.17 Å. La(1) is bonded in a 13-coordinate geometry to one Al(3), two equivalent Al(2), two equivalent Al(4), two equivalent Al(5), two equivalent Al(6), two equivalent Al(7), and two equivalent Al(8) atoms. The La(1)-Al(3) bond length is 3.35 Å. Both La(1)-Al(2) bond lengths are 3.24 Å. Both La(1)-Al(4) bond lengths are 3.22 Å. Both La(1)-Al(5) bond lengths are 3.24 Å. There is one shorter (3.33 Å) and one longer (3.46 Å) La(1)-Al(6) bond length. Both La(1)-Al(7) bond lengths are 3.26 Å. Both La(1)-Al(8) bond lengths are 3.22 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 9-coordinate geometry to one Mg(1), one Al(3), one Al(6), two equivalent Al(2), two equivalent Al(4), and two equivalent Al(7) atoms. The Fe(1)-Al(3) bond length is 2.32 Å. The Fe(1)-Al(6) bond length is 2.32 Å. Both Fe(1)-Al(2) bond lengths are 2.55 Å. Both Fe(1)-Al(4) bond lengths are 2.54 Å. Both Fe(1)-Al(7) bond lengths are 2.55 Å. In the second Fe site, Fe(2) is bonded in a 9-coordinate geometry to two equivalent Mg(1), one Al(6), two equivalent Al(1), two equivalent Al(5), and two equivalent Al(8) atoms. The Fe(2)-Al(6) bond length is 2.35 Å. Both Fe(2)-Al(1) bond lengths are 2.45 Å. Both Fe(2)-Al(5) bond lengths are 2.60 Å. Both Fe(2)-Al(8) bond lengths are 2.59 Å. There are eight inequivalent Al sites. In the first Al site, Al(8) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent La(1), two equivalent Fe(2), one Al(1), one Al(4), one Al(5), one Al(7), and two equivalent Al(6) atoms. The Al(8)-Al(1) bond length is 2.65 Å. The Al(8)-Al(4) bond length is 2.90 Å. The Al(8)-Al(5) bond length is 2.78 Å. The Al(8)-Al(7) bond length is 2.90 Å. Both Al(8)-Al(6) bond lengths are 2.88 Å. In the second Al site, Al(1) is bonded to four equivalent Mg(1), four equivalent Fe(2), two equivalent Al(5), and two equivalent Al(8) atoms to form distorted face-sharing AlMg4Al4Fe4 cuboctahedra. Both Al(1)-Al(5) bond lengths are 2.67 Å. In the third Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Mg(1), two equivalent La(1), two equivalent Fe(1), one Al(5), one Al(7), two equivalent Al(3), and two equivalent Al(4) atoms. The Al(2)-Al(5) bond length is 2.85 Å. The Al(2)-Al(7) bond length is 2.71 Å. Both Al(2)-Al(3) bond lengths are 2.94 Å. There is one shorter (2.70 Å) and one longer (3.10 Å) Al(2)-Al(4) bond length. In the fourth Al site, Al(3) is bonded in a distorted linear geometry to two equivalent La(1), two equivalent Fe(1), four equivalent Al(2), and four equivalent Al(4) atoms. All Al(3)-Al(4) bond lengths are 2.80 Å. In the fifth Al site, Al(4) is bonded in a 12-coordinate geometry to two equivalent La(1), two equivalent Fe(1), one Al(7), one Al(8), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(6) atoms. The Al(4)-Al(7) bond length is 2.70 Å. Both Al(4)-Al(6) bond lengths are 2.82 Å. In the sixth Al site, Al(5) is bonded in a 11-coordinate geometry to two equivalent Mg(1), two equivalent La(1), two equivalent Fe(2), one Al(1), one Al(2), one Al(8), and two equivalent Al(6) atoms. Both Al(5)-Al(6) bond lengths are 2.82 Å. In the seventh Al site, Al(6) is bonded in a distorted linear geometry to two equivalent La(1), one Fe(1), one Fe(2), two equivalent Al(4), two equivalent Al(5), and two equivalent Al(8) atoms. In the eighth Al site, Al(7) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent La(1), two equivalent Fe(1), one Al(2), one Al(4), and one Al(8) atom.