La6MgGe2S14 crystallizes in the trigonal P3 space group. Mg(1) is bonded in an octahedral geometry to three equivalent S(5) and three equivalent S(6) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one S(2), one S(3), two equivalent S(1), two equivalent S(5), and two equivalent S(6) atoms. In the second La site, La(2) is bonded in a 8-coordinate geometry to one S(1), one S(4), two equivalent S(2), two equivalent S(5), and two equivalent S(6) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to one S(3) and three equivalent S(1) atoms. In the second Ge site, Ge(2) is bonded in a tetrahedral geometry to one S(4) and three equivalent S(2) atoms. There are six inequivalent S sites. In the first S site, S(1) is bonded in a distorted rectangular see-saw-like geometry to one La(2), two equivalent La(1), and one Ge(1) atom. In the second S site, S(2) is bonded in a distorted rectangular see-saw-like geometry to one La(1), two equivalent La(2), and one Ge(2) atom. In the third S site, S(3) is bonded to three equivalent La(1) and one Ge(1) atom to form corner-sharing SLa3Ge tetrahedra. In the fourth S site, S(4) is bonded to three equivalent La(2) and one Ge(2) atom to form corner-sharing SLa3Ge tetrahedra. In the fifth S site, S(5) is bonded to one Mg(1), two equivalent La(1), and two equivalent La(2) atoms to form distorted SLa4Mg trigonal bipyramids that share corners with two equivalent S(3)La3Ge tetrahedra, corners with two equivalent S(4)La3Ge tetrahedra,  a cornercorner with one S(6)La4Mg trigonal bipyramid, corners with two equivalent S(5)La4Mg trigonal bipyramids, edges with two equivalent S(5)La4Mg trigonal bipyramids, edges with two equivalent S(6)La4Mg trigonal bipyramids, and faces with two equivalent S(6)La4Mg trigonal bipyramids. In the sixth S site, S(6) is bonded to one Mg(1), two equivalent La(1), and two equivalent La(2) atoms to form distorted SLa4Mg trigonal bipyramids that share corners with two equivalent S(3)La3Ge tetrahedra, corners with two equivalent S(4)La3Ge tetrahedra,  a cornercorner with one S(5)La4Mg trigonal bipyramid, corners with two equivalent S(6)La4Mg trigonal bipyramids, edges with two equivalent S(5)La4Mg trigonal bipyramids, edges with two equivalent S(6)La4Mg trigonal bipyramids, and faces with two equivalent S(5)La4Mg trigonal bipyramids.
La6MgGe2S14 crystallizes in the trigonal P3 space group. Mg(1) is bonded in an octahedral geometry to three equivalent S(5) and three equivalent S(6) atoms. All Mg(1)-S(5) bond lengths are 2.64 Å. All Mg(1)-S(6) bond lengths are 2.64 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one S(2), one S(3), two equivalent S(1), two equivalent S(5), and two equivalent S(6) atoms. The La(1)-S(2) bond length is 3.09 Å. The La(1)-S(3) bond length is 3.10 Å. There is one shorter (2.94 Å) and one longer (3.03 Å) La(1)-S(1) bond length. There is one shorter (2.96 Å) and one longer (3.22 Å) La(1)-S(5) bond length. There is one shorter (2.88 Å) and one longer (2.90 Å) La(1)-S(6) bond length. In the second La site, La(2) is bonded in a 8-coordinate geometry to one S(1), one S(4), two equivalent S(2), two equivalent S(5), and two equivalent S(6) atoms. The La(2)-S(1) bond length is 3.08 Å. The La(2)-S(4) bond length is 3.10 Å. There is one shorter (2.95 Å) and one longer (3.03 Å) La(2)-S(2) bond length. There is one shorter (2.89 Å) and one longer (2.90 Å) La(2)-S(5) bond length. There is one shorter (3.06 Å) and one longer (3.13 Å) La(2)-S(6) bond length. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to one S(3) and three equivalent S(1) atoms. The Ge(1)-S(3) bond length is 2.20 Å. All Ge(1)-S(1) bond lengths are 2.25 Å. In the second Ge site, Ge(2) is bonded in a tetrahedral geometry to one S(4) and three equivalent S(2) atoms. The Ge(2)-S(4) bond length is 2.20 Å. All Ge(2)-S(2) bond lengths are 2.24 Å. There are six inequivalent S sites. In the first S site, S(1) is bonded in a distorted rectangular see-saw-like geometry to one La(2), two equivalent La(1), and one Ge(1) atom. In the second S site, S(2) is bonded in a distorted rectangular see-saw-like geometry to one La(1), two equivalent La(2), and one Ge(2) atom. In the third S site, S(3) is bonded to three equivalent La(1) and one Ge(1) atom to form corner-sharing SLa3Ge tetrahedra. In the fourth S site, S(4) is bonded to three equivalent La(2) and one Ge(2) atom to form corner-sharing SLa3Ge tetrahedra. In the fifth S site, S(5) is bonded to one Mg(1), two equivalent La(1), and two equivalent La(2) atoms to form distorted SLa4Mg trigonal bipyramids that share corners with two equivalent S(3)La3Ge tetrahedra, corners with two equivalent S(4)La3Ge tetrahedra,  a cornercorner with one S(6)La4Mg trigonal bipyramid, corners with two equivalent S(5)La4Mg trigonal bipyramids, edges with two equivalent S(5)La4Mg trigonal bipyramids, edges with two equivalent S(6)La4Mg trigonal bipyramids, and faces with two equivalent S(6)La4Mg trigonal bipyramids. In the sixth S site, S(6) is bonded to one Mg(1), two equivalent La(1), and two equivalent La(2) atoms to form distorted SLa4Mg trigonal bipyramids that share corners with two equivalent S(3)La3Ge tetrahedra, corners with two equivalent S(4)La3Ge tetrahedra,  a cornercorner with one S(5)La4Mg trigonal bipyramid, corners with two equivalent S(6)La4Mg trigonal bipyramids, edges with two equivalent S(5)La4Mg trigonal bipyramids, edges with two equivalent S(6)La4Mg trigonal bipyramids, and faces with two equivalent S(5)La4Mg trigonal bipyramids.