La12Au3I13 crystallizes in the triclinic P1 space group. There are twelve inequivalent La sites. In the first La site, La(1) is bonded to one Au(2), one I(1), one I(13), one I(3), one I(8), and one I(9) atom to form LaAuI5 octahedra that share corners with two equivalent La(7)Au2I4 octahedra, corners with two equivalent La(11)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. In the second La site, La(2) is bonded to one Au(2), one I(10), one I(13), one I(2), one I(4), and one I(6) atom to form LaAuI5 octahedra that share corners with two equivalent La(3)Au2I4 octahedra, corners with two equivalent La(9)AuI5 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra, and  an edgeedge with one La(12)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. In the third La site, La(3) is bonded to one Au(1), one Au(2), one I(12), one I(4), one I(5), and one I(8) atom to form LaAu2I4 octahedra that share corners with two equivalent La(2)AuI5 octahedra, corners with two equivalent La(9)AuI5 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra, and  an edgeedge with one La(12)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. In the fourth La site, La(4) is bonded to one Au(1), one Au(2), one I(11), one I(3), one I(6), and one I(7) atom to form LaAu2I4 octahedra that share corners with two equivalent La(5)Au2I4 octahedra, corners with two equivalent La(8)Au2I4 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 6-11°. In the fifth La site, La(5) is bonded to one Au(2), one Au(3), one I(12), one I(2), one I(7), and one I(9) atom to form LaAu2I4 octahedra that share corners with two equivalent La(4)Au2I4 octahedra, corners with two equivalent La(8)Au2I4 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 6-11°. In the sixth La site, La(6) is bonded to one Au(1), one Au(3), one I(10), one I(2), one I(3), and one I(8) atom to form LaAu2I4 octahedra that share corners with two equivalent La(10)AuI5 octahedra, corners with two equivalent La(12)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. In the seventh La site, La(7) is bonded to one Au(2), one Au(3), one I(1), one I(10), one I(11), and one I(5) atom to form LaAu2I4 octahedra that share corners with two equivalent La(1)AuI5 octahedra, corners with two equivalent La(11)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. In the eighth La site, La(8) is bonded to one Au(1), one Au(3), one I(1), one I(4), one I(6), and one I(9) atom to form LaAu2I4 octahedra that share corners with two equivalent La(4)Au2I4 octahedra, corners with two equivalent La(5)Au2I4 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 7-11°. In the ninth La site, La(9) is bonded to one Au(1), one I(1), one I(10), one I(12), one I(13), and one I(7) atom to form LaAuI5 octahedra that share corners with two equivalent La(3)Au2I4 octahedra, corners with two equivalent La(2)AuI5 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra, and  an edgeedge with one La(12)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. In the tenth La site, La(10) is bonded to one Au(1), one I(11), one I(13), one I(2), one I(5), and one I(9) atom to form LaAuI5 octahedra that share corners with two equivalent La(6)Au2I4 octahedra, corners with two equivalent La(12)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. In the eleventh La site, La(11) is bonded to one Au(3), one I(11), one I(13), one I(4), one I(7), and one I(8) atom to form LaAuI5 octahedra that share corners with two equivalent La(7)Au2I4 octahedra, corners with two equivalent La(1)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. In the twelfth La site, La(12) is bonded to one Au(3), one I(12), one I(13), one I(3), one I(5), and one I(6) atom to form LaAuI5 octahedra that share corners with two equivalent La(6)Au2I4 octahedra, corners with two equivalent La(10)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded to one La(10), one La(3), one La(4), one La(6), one La(8), and one La(9) atom to form AuLa6 octahedra that share  an edgeedge with one Au(2)La6 octahedra,  an edgeedge with one Au(3)La6 octahedra, and  an edgeedge with one I(13)La6 octahedra. In the second Au site, Au(2) is bonded to one La(1), one La(2), one La(3), one La(4), one La(5), and one La(7) atom to form AuLa6 octahedra that share  an edgeedge with one Au(1)La6 octahedra,  an edgeedge with one Au(3)La6 octahedra, and  an edgeedge with one I(13)La6 octahedra. In the third Au site, Au(3) is bonded to one La(11), one La(12), one La(5), one La(6), one La(7), and one La(8) atom to form AuLa6 octahedra that share  an edgeedge with one Au(1)La6 octahedra,  an edgeedge with one Au(2)La6 octahedra, and  an edgeedge with one I(13)La6 octahedra. There are thirteen inequivalent I sites. In the first I site, I(1) is bonded in a rectangular see-saw-like geometry to one La(1), one La(7), one La(8), and one La(9) atom. In the second I site, I(2) is bonded in a rectangular see-saw-like geometry to one La(10), one La(2), one La(5), and one La(6) atom. In the third I site, I(3) is bonded in a rectangular see-saw-like geometry to one La(1), one La(12), one La(4), and one La(6) atom. In the fourth I site, I(4) is bonded in a rectangular see-saw-like geometry to one La(11), one La(2), one La(3), and one La(8) atom. In the fifth I site, I(5) is bonded in a rectangular see-saw-like geometry to one La(10), one La(12), one La(3), and one La(7) atom. In the sixth I site, I(6) is bonded in a rectangular see-saw-like geometry to one La(12), one La(2), one La(4), and one La(8) atom. In the seventh I site, I(7) is bonded in a rectangular see-saw-like geometry to one La(11), one La(4), one La(5), and one La(9) atom. In the eighth I site, I(8) is bonded in a rectangular see-saw-like geometry to one La(1), one La(11), one La(3), and one La(6) atom. In the ninth I site, I(9) is bonded in a rectangular see-saw-like geometry to one La(1), one La(10), one La(5), and one La(8) atom. In the tenth I site, I(10) is bonded in a rectangular see-saw-like geometry to one La(2), one La(6), one La(7), and one La(9) atom. In the eleventh I site, I(11) is bonded in a rectangular see-saw-like geometry to one La(10), one La(11), one La(4), and one La(7) atom. In the twelfth I site, I(12) is bonded in a rectangular see-saw-like geometry to one La(12), one La(3), one La(5), and one La(9) atom. In the thirteenth I site, I(13) is bonded to one La(1), one La(10), one La(11), one La(12), one La(2), and one La(9) atom to form ILa6 octahedra that share  an edgeedge with one Au(1)La6 octahedra,  an edgeedge with one Au(2)La6 octahedra, and  an edgeedge with one Au(3)La6 octahedra.
La12Au3I13 crystallizes in the triclinic P1 space group. There are twelve inequivalent La sites. In the first La site, La(1) is bonded to one Au(2), one I(1), one I(13), one I(3), one I(8), and one I(9) atom to form LaAuI5 octahedra that share corners with two equivalent La(7)Au2I4 octahedra, corners with two equivalent La(11)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. The La(1)-Au(2) bond length is 3.02 Å. The La(1)-I(1) bond length is 3.38 Å. The La(1)-I(13) bond length is 3.14 Å. The La(1)-I(3) bond length is 3.35 Å. The La(1)-I(8) bond length is 3.30 Å. The La(1)-I(9) bond length is 3.31 Å. In the second La site, La(2) is bonded to one Au(2), one I(10), one I(13), one I(2), one I(4), and one I(6) atom to form LaAuI5 octahedra that share corners with two equivalent La(3)Au2I4 octahedra, corners with two equivalent La(9)AuI5 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra, and  an edgeedge with one La(12)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. The La(2)-Au(2) bond length is 3.02 Å. The La(2)-I(10) bond length is 3.30 Å. The La(2)-I(13) bond length is 3.14 Å. The La(2)-I(2) bond length is 3.34 Å. The La(2)-I(4) bond length is 3.38 Å. The La(2)-I(6) bond length is 3.31 Å. In the third La site, La(3) is bonded to one Au(1), one Au(2), one I(12), one I(4), one I(5), and one I(8) atom to form LaAu2I4 octahedra that share corners with two equivalent La(2)AuI5 octahedra, corners with two equivalent La(9)AuI5 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra, and  an edgeedge with one La(12)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. The La(3)-Au(1) bond length is 3.03 Å. The La(3)-Au(2) bond length is 3.03 Å. The La(3)-I(12) bond length is 3.43 Å. The La(3)-I(4) bond length is 3.42 Å. The La(3)-I(5) bond length is 3.36 Å. The La(3)-I(8) bond length is 3.37 Å. In the fourth La site, La(4) is bonded to one Au(1), one Au(2), one I(11), one I(3), one I(6), and one I(7) atom to form LaAu2I4 octahedra that share corners with two equivalent La(5)Au2I4 octahedra, corners with two equivalent La(8)Au2I4 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 6-11°. The La(4)-Au(1) bond length is 2.99 Å. The La(4)-Au(2) bond length is 2.98 Å. The La(4)-I(11) bond length is 3.35 Å. The La(4)-I(3) bond length is 3.35 Å. The La(4)-I(6) bond length is 3.45 Å. The La(4)-I(7) bond length is 3.46 Å. In the fifth La site, La(5) is bonded to one Au(2), one Au(3), one I(12), one I(2), one I(7), and one I(9) atom to form LaAu2I4 octahedra that share corners with two equivalent La(4)Au2I4 octahedra, corners with two equivalent La(8)Au2I4 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 6-11°. The La(5)-Au(2) bond length is 2.98 Å. The La(5)-Au(3) bond length is 2.98 Å. The La(5)-I(12) bond length is 3.35 Å. The La(5)-I(2) bond length is 3.35 Å. The La(5)-I(7) bond length is 3.46 Å. The La(5)-I(9) bond length is 3.46 Å. In the sixth La site, La(6) is bonded to one Au(1), one Au(3), one I(10), one I(2), one I(3), and one I(8) atom to form LaAu2I4 octahedra that share corners with two equivalent La(10)AuI5 octahedra, corners with two equivalent La(12)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. The La(6)-Au(1) bond length is 3.03 Å. The La(6)-Au(3) bond length is 3.03 Å. The La(6)-I(10) bond length is 3.37 Å. The La(6)-I(2) bond length is 3.43 Å. The La(6)-I(3) bond length is 3.42 Å. The La(6)-I(8) bond length is 3.37 Å. In the seventh La site, La(7) is bonded to one Au(2), one Au(3), one I(1), one I(10), one I(11), and one I(5) atom to form LaAu2I4 octahedra that share corners with two equivalent La(1)AuI5 octahedra, corners with two equivalent La(11)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-9°. The La(7)-Au(2) bond length is 3.03 Å. The La(7)-Au(3) bond length is 3.03 Å. The La(7)-I(1) bond length is 3.42 Å. The La(7)-I(10) bond length is 3.37 Å. The La(7)-I(11) bond length is 3.42 Å. The La(7)-I(5) bond length is 3.37 Å. In the eighth La site, La(8) is bonded to one Au(1), one Au(3), one I(1), one I(4), one I(6), and one I(9) atom to form LaAu2I4 octahedra that share corners with two equivalent La(4)Au2I4 octahedra, corners with two equivalent La(5)Au2I4 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 7-11°. The La(8)-Au(1) bond length is 2.99 Å. The La(8)-Au(3) bond length is 2.98 Å. The La(8)-I(1) bond length is 3.35 Å. The La(8)-I(4) bond length is 3.35 Å. The La(8)-I(6) bond length is 3.45 Å. The La(8)-I(9) bond length is 3.46 Å. In the ninth La site, La(9) is bonded to one Au(1), one I(1), one I(10), one I(12), one I(13), and one I(7) atom to form LaAuI5 octahedra that share corners with two equivalent La(3)Au2I4 octahedra, corners with two equivalent La(2)AuI5 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra, and  an edgeedge with one La(12)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. The La(9)-Au(1) bond length is 3.01 Å. The La(9)-I(1) bond length is 3.35 Å. The La(9)-I(10) bond length is 3.30 Å. The La(9)-I(12) bond length is 3.38 Å. The La(9)-I(13) bond length is 3.13 Å. The La(9)-I(7) bond length is 3.31 Å. In the tenth La site, La(10) is bonded to one Au(1), one I(11), one I(13), one I(2), one I(5), and one I(9) atom to form LaAuI5 octahedra that share corners with two equivalent La(6)Au2I4 octahedra, corners with two equivalent La(12)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. The La(10)-Au(1) bond length is 3.01 Å. The La(10)-I(11) bond length is 3.35 Å. The La(10)-I(13) bond length is 3.13 Å. The La(10)-I(2) bond length is 3.38 Å. The La(10)-I(5) bond length is 3.30 Å. The La(10)-I(9) bond length is 3.31 Å. In the eleventh La site, La(11) is bonded to one Au(3), one I(11), one I(13), one I(4), one I(7), and one I(8) atom to form LaAuI5 octahedra that share corners with two equivalent La(7)Au2I4 octahedra, corners with two equivalent La(1)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(6)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(10)AuI5 octahedra,  an edgeedge with one La(12)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. The La(11)-Au(3) bond length is 3.02 Å. The La(11)-I(11) bond length is 3.38 Å. The La(11)-I(13) bond length is 3.14 Å. The La(11)-I(4) bond length is 3.35 Å. The La(11)-I(7) bond length is 3.31 Å. The La(11)-I(8) bond length is 3.30 Å. In the twelfth La site, La(12) is bonded to one Au(3), one I(12), one I(13), one I(3), one I(5), and one I(6) atom to form LaAuI5 octahedra that share corners with two equivalent La(6)Au2I4 octahedra, corners with two equivalent La(10)AuI5 octahedra,  an edgeedge with one La(3)Au2I4 octahedra,  an edgeedge with one La(4)Au2I4 octahedra,  an edgeedge with one La(5)Au2I4 octahedra,  an edgeedge with one La(7)Au2I4 octahedra,  an edgeedge with one La(8)Au2I4 octahedra,  an edgeedge with one La(1)AuI5 octahedra,  an edgeedge with one La(11)AuI5 octahedra,  an edgeedge with one La(2)AuI5 octahedra, and  an edgeedge with one La(9)AuI5 octahedra. The corner-sharing octahedral tilt angles range from 4-11°. The La(12)-Au(3) bond length is 3.02 Å. The La(12)-I(12) bond length is 3.35 Å. The La(12)-I(13) bond length is 3.14 Å. The La(12)-I(3) bond length is 3.38 Å. The La(12)-I(5) bond length is 3.30 Å. The La(12)-I(6) bond length is 3.31 Å. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded to one La(10), one La(3), one La(4), one La(6), one La(8), and one La(9) atom to form AuLa6 octahedra that share  an edgeedge with one Au(2)La6 octahedra,  an edgeedge with one Au(3)La6 octahedra, and  an edgeedge with one I(13)La6 octahedra. In the second Au site, Au(2) is bonded to one La(1), one La(2), one La(3), one La(4), one La(5), and one La(7) atom to form AuLa6 octahedra that share  an edgeedge with one Au(1)La6 octahedra,  an edgeedge with one Au(3)La6 octahedra, and  an edgeedge with one I(13)La6 octahedra. In the third Au site, Au(3) is bonded to one La(11), one La(12), one La(5), one La(6), one La(7), and one La(8) atom to form AuLa6 octahedra that share  an edgeedge with one Au(1)La6 octahedra,  an edgeedge with one Au(2)La6 octahedra, and  an edgeedge with one I(13)La6 octahedra. There are thirteen inequivalent I sites. In the first I site, I(1) is bonded in a rectangular see-saw-like geometry to one La(1), one La(7), one La(8), and one La(9) atom. In the second I site, I(2) is bonded in a rectangular see-saw-like geometry to one La(10), one La(2), one La(5), and one La(6) atom. In the third I site, I(3) is bonded in a rectangular see-saw-like geometry to one La(1), one La(12), one La(4), and one La(6) atom. In the fourth I site, I(4) is bonded in a rectangular see-saw-like geometry to one La(11), one La(2), one La(3), and one La(8) atom. In the fifth I site, I(5) is bonded in a rectangular see-saw-like geometry to one La(10), one La(12), one La(3), and one La(7) atom. In the sixth I site, I(6) is bonded in a rectangular see-saw-like geometry to one La(12), one La(2), one La(4), and one La(8) atom. In the seventh I site, I(7) is bonded in a rectangular see-saw-like geometry to one La(11), one La(4), one La(5), and one La(9) atom. In the eighth I site, I(8) is bonded in a rectangular see-saw-like geometry to one La(1), one La(11), one La(3), and one La(6) atom. In the ninth I site, I(9) is bonded in a rectangular see-saw-like geometry to one La(1), one La(10), one La(5), and one La(8) atom. In the tenth I site, I(10) is bonded in a rectangular see-saw-like geometry to one La(2), one La(6), one La(7), and one La(9) atom. In the eleventh I site, I(11) is bonded in a rectangular see-saw-like geometry to one La(10), one La(11), one La(4), and one La(7) atom. In the twelfth I site, I(12) is bonded in a rectangular see-saw-like geometry to one La(12), one La(3), one La(5), and one La(9) atom. In the thirteenth I site, I(13) is bonded to one La(1), one La(10), one La(11), one La(12), one La(2), and one La(9) atom to form ILa6 octahedra that share  an edgeedge with one Au(1)La6 octahedra,  an edgeedge with one Au(2)La6 octahedra, and  an edgeedge with one Au(3)La6 octahedra.