MgLa2Fe2(TeO6)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(7), and one O(8) atom. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to one O(10), one O(11), one O(12), one O(2), one O(3), one O(4), and one O(6) atom. In the second La site, La(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(11), one O(2), one O(4), one O(6), one O(7), and one O(9) atom to form distorted FeO6 octahedra that share corners with two equivalent Te(1)O6 octahedra and corners with four equivalent Te(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 21-40°. In the second Fe site, Fe(2) is bonded to one O(1), one O(10), one O(12), one O(3), one O(5), and one O(8) atom to form distorted FeO6 octahedra that share corners with two equivalent Te(2)O6 octahedra and corners with four equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-36°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(10), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form TeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra and corners with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-36°. In the second Te site, Te(2) is bonded to one O(1), one O(11), one O(12), one O(2), one O(4), and one O(9) atom to form TeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra and corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 21-40°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one La(2), one Fe(2), and one Te(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), one La(1), one La(2), one Fe(1), and one Te(2) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), one La(1), one La(2), one Fe(2), and one Te(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one La(1), one La(2), one Fe(1), and one Te(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one La(2), one Fe(2), and one Te(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one La(1), one Fe(1), and one Te(1) atom. In the seventh O site, O(7) is bonded to one Mg(1), one La(2), one Fe(1), and one Te(1) atom to form a mixture of distorted corner and edge-sharing OLaMgFeTe tetrahedra. In the eighth O site, O(8) is bonded to one Mg(1), one La(2), one Fe(2), and one Te(1) atom to form a mixture of distorted corner and edge-sharing OLaMgFeTe tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one La(2), one Fe(1), and one Te(2) atom. In the tenth O site, O(10) is bonded to one Mg(1), one La(1), one Fe(2), and one Te(1) atom to form a mixture of distorted corner and edge-sharing OLaMgFeTe tetrahedra. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one La(1), one Fe(1), and one Te(2) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one La(1), one Fe(2), and one Te(2) atom.
MgLa2Fe2(TeO6)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(7), and one O(8) atom. The Mg(1)-O(1) bond length is 2.11 Å. The Mg(1)-O(10) bond length is 2.32 Å. The Mg(1)-O(2) bond length is 2.27 Å. The Mg(1)-O(3) bond length is 2.17 Å. The Mg(1)-O(7) bond length is 2.22 Å. The Mg(1)-O(8) bond length is 2.58 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to one O(10), one O(11), one O(12), one O(2), one O(3), one O(4), and one O(6) atom. The La(1)-O(10) bond length is 2.42 Å. The La(1)-O(11) bond length is 2.36 Å. The La(1)-O(12) bond length is 2.34 Å. The La(1)-O(2) bond length is 2.84 Å. The La(1)-O(3) bond length is 2.85 Å. The La(1)-O(4) bond length is 2.72 Å. The La(1)-O(6) bond length is 2.41 Å. In the second La site, La(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. The La(2)-O(1) bond length is 2.67 Å. The La(2)-O(2) bond length is 2.57 Å. The La(2)-O(3) bond length is 2.57 Å. The La(2)-O(4) bond length is 2.75 Å. The La(2)-O(5) bond length is 2.58 Å. The La(2)-O(7) bond length is 2.44 Å. The La(2)-O(8) bond length is 2.48 Å. The La(2)-O(9) bond length is 2.39 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(11), one O(2), one O(4), one O(6), one O(7), and one O(9) atom to form distorted FeO6 octahedra that share corners with two equivalent Te(1)O6 octahedra and corners with four equivalent Te(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 21-40°. The Fe(1)-O(11) bond length is 2.09 Å. The Fe(1)-O(2) bond length is 2.68 Å. The Fe(1)-O(4) bond length is 2.03 Å. The Fe(1)-O(6) bond length is 2.16 Å. The Fe(1)-O(7) bond length is 2.18 Å. The Fe(1)-O(9) bond length is 2.04 Å. In the second Fe site, Fe(2) is bonded to one O(1), one O(10), one O(12), one O(3), one O(5), and one O(8) atom to form distorted FeO6 octahedra that share corners with two equivalent Te(2)O6 octahedra and corners with four equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-36°. The Fe(2)-O(1) bond length is 2.26 Å. The Fe(2)-O(10) bond length is 2.16 Å. The Fe(2)-O(12) bond length is 2.13 Å. The Fe(2)-O(3) bond length is 2.55 Å. The Fe(2)-O(5) bond length is 2.07 Å. The Fe(2)-O(8) bond length is 2.02 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(10), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form TeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra and corners with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-36°. The Te(1)-O(10) bond length is 1.96 Å. The Te(1)-O(3) bond length is 2.00 Å. The Te(1)-O(5) bond length is 1.93 Å. The Te(1)-O(6) bond length is 1.91 Å. The Te(1)-O(7) bond length is 1.98 Å. The Te(1)-O(8) bond length is 1.96 Å. In the second Te site, Te(2) is bonded to one O(1), one O(11), one O(12), one O(2), one O(4), and one O(9) atom to form TeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra and corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 21-40°. The Te(2)-O(1) bond length is 1.99 Å. The Te(2)-O(11) bond length is 1.93 Å. The Te(2)-O(12) bond length is 1.94 Å. The Te(2)-O(2) bond length is 1.99 Å. The Te(2)-O(4) bond length is 1.96 Å. The Te(2)-O(9) bond length is 1.93 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one La(2), one Fe(2), and one Te(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), one La(1), one La(2), one Fe(1), and one Te(2) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), one La(1), one La(2), one Fe(2), and one Te(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one La(1), one La(2), one Fe(1), and one Te(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one La(2), one Fe(2), and one Te(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one La(1), one Fe(1), and one Te(1) atom. In the seventh O site, O(7) is bonded to one Mg(1), one La(2), one Fe(1), and one Te(1) atom to form a mixture of distorted corner and edge-sharing OLaMgFeTe tetrahedra. In the eighth O site, O(8) is bonded to one Mg(1), one La(2), one Fe(2), and one Te(1) atom to form a mixture of distorted corner and edge-sharing OLaMgFeTe tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one La(2), one Fe(1), and one Te(2) atom. In the tenth O site, O(10) is bonded to one Mg(1), one La(1), one Fe(2), and one Te(1) atom to form a mixture of distorted corner and edge-sharing OLaMgFeTe tetrahedra. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one La(1), one Fe(1), and one Te(2) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one La(1), one Fe(2), and one Te(2) atom.