SrLaI5 is Zircon-like structured and crystallizes in the monoclinic Cc space group. Sr(1) is bonded in a 9-coordinate geometry to one I(1), one I(3), one I(5), three equivalent I(2), and three equivalent I(4) atoms. La(1) is bonded in a 8-coordinate geometry to one I(2), one I(4), two equivalent I(1), two equivalent I(3), and two equivalent I(5) atoms. There are five inequivalent I sites. In the first I site, I(1) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1) and two equivalent La(1) atoms. In the second I site, I(2) is bonded to three equivalent Sr(1) and one La(1) atom to form a mixture of distorted corner and edge-sharing ISr3La tetrahedra. In the third I site, I(3) is bonded in a distorted bent 150 degrees geometry to one Sr(1) and two equivalent La(1) atoms. In the fourth I site, I(4) is bonded to three equivalent Sr(1) and one La(1) atom to form a mixture of distorted corner and edge-sharing ISr3La tetrahedra. In the fifth I site, I(5) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1) and two equivalent La(1) atoms.
SrLaI5 is Zircon-like structured and crystallizes in the monoclinic Cc space group. Sr(1) is bonded in a 9-coordinate geometry to one I(1), one I(3), one I(5), three equivalent I(2), and three equivalent I(4) atoms. The Sr(1)-I(1) bond length is 3.61 Å. The Sr(1)-I(3) bond length is 4.03 Å. The Sr(1)-I(5) bond length is 3.57 Å. There are a spread of Sr(1)-I(2) bond distances ranging from 3.48-3.92 Å. There are a spread of Sr(1)-I(4) bond distances ranging from 3.41-3.99 Å. La(1) is bonded in a 8-coordinate geometry to one I(2), one I(4), two equivalent I(1), two equivalent I(3), and two equivalent I(5) atoms. The La(1)-I(2) bond length is 3.29 Å. The La(1)-I(4) bond length is 3.29 Å. There is one shorter (3.27 Å) and one longer (3.30 Å) La(1)-I(1) bond length. There is one shorter (3.38 Å) and one longer (3.40 Å) La(1)-I(3) bond length. There is one shorter (3.26 Å) and one longer (3.29 Å) La(1)-I(5) bond length. There are five inequivalent I sites. In the first I site, I(1) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1) and two equivalent La(1) atoms. In the second I site, I(2) is bonded to three equivalent Sr(1) and one La(1) atom to form a mixture of distorted corner and edge-sharing ISr3La tetrahedra. In the third I site, I(3) is bonded in a distorted bent 150 degrees geometry to one Sr(1) and two equivalent La(1) atoms. In the fourth I site, I(4) is bonded to three equivalent Sr(1) and one La(1) atom to form a mixture of distorted corner and edge-sharing ISr3La tetrahedra. In the fifth I site, I(5) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1) and two equivalent La(1) atoms.