La3OsI3 is Ilmenite-like structured and crystallizes in the trigonal R32 space group. There are three inequivalent La sites. In the first La site, La(1) is bonded to two equivalent Os(1), two equivalent I(1), and two equivalent I(3) atoms to form a mixture of distorted corner and edge-sharing LaOs2I4 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the second La site, La(2) is bonded to one Os(1), one Os(2), one I(2), one I(3), and two equivalent I(1) atoms to form a mixture of distorted corner and edge-sharing LaOs2I4 octahedra. The corner-sharing octahedral tilt angles range from 8-13°. In the third La site, La(3) is bonded to two equivalent Os(1), two equivalent I(1), and two equivalent I(2) atoms to form a mixture of distorted corner and edge-sharing LaOs2I4 octahedra. The corner-sharing octahedral tilt angles range from 8-13°. There are two inequivalent Os sites. In the first Os site, Os(1) is bonded to two equivalent La(1), two equivalent La(2), and two equivalent La(3) atoms to form edge-sharing OsLa6 octahedra. In the second Os site, Os(2) is bonded to six equivalent La(2) atoms to form edge-sharing OsLa6 octahedra. There are three inequivalent I sites. In the first I site, I(1) is bonded in a distorted rectangular see-saw-like geometry to one La(1), one La(3), and two equivalent La(2) atoms. In the second I site, I(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent La(2) and two equivalent La(3) atoms. In the third I site, I(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent La(1) and two equivalent La(2) atoms.
La3OsI3 is Ilmenite-like structured and crystallizes in the trigonal R32 space group. There are three inequivalent La sites. In the first La site, La(1) is bonded to two equivalent Os(1), two equivalent I(1), and two equivalent I(3) atoms to form a mixture of distorted corner and edge-sharing LaOs2I4 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. Both La(1)-Os(1) bond lengths are 2.88 Å. Both La(1)-I(1) bond lengths are 3.33 Å. Both La(1)-I(3) bond lengths are 3.48 Å. In the second La site, La(2) is bonded to one Os(1), one Os(2), one I(2), one I(3), and two equivalent I(1) atoms to form a mixture of distorted corner and edge-sharing LaOs2I4 octahedra. The corner-sharing octahedral tilt angles range from 8-13°. The La(2)-Os(1) bond length is 2.92 Å. The La(2)-Os(2) bond length is 2.89 Å. The La(2)-I(2) bond length is 3.48 Å. The La(2)-I(3) bond length is 3.32 Å. There is one shorter (3.33 Å) and one longer (3.46 Å) La(2)-I(1) bond length. In the third La site, La(3) is bonded to two equivalent Os(1), two equivalent I(1), and two equivalent I(2) atoms to form a mixture of distorted corner and edge-sharing LaOs2I4 octahedra. The corner-sharing octahedral tilt angles range from 8-13°. Both La(3)-Os(1) bond lengths are 2.89 Å. Both La(3)-I(1) bond lengths are 3.47 Å. Both La(3)-I(2) bond lengths are 3.33 Å. There are two inequivalent Os sites. In the first Os site, Os(1) is bonded to two equivalent La(1), two equivalent La(2), and two equivalent La(3) atoms to form edge-sharing OsLa6 octahedra. In the second Os site, Os(2) is bonded to six equivalent La(2) atoms to form edge-sharing OsLa6 octahedra. There are three inequivalent I sites. In the first I site, I(1) is bonded in a distorted rectangular see-saw-like geometry to one La(1), one La(3), and two equivalent La(2) atoms. In the second I site, I(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent La(2) and two equivalent La(3) atoms. In the third I site, I(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent La(1) and two equivalent La(2) atoms.