BaSrI4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Pnma space group. Ba(1) is bonded to two equivalent I(1), two equivalent I(2), and two equivalent I(3) atoms to form BaI6 octahedra that share corners with eight equivalent Sr(1)I6 octahedra and edges with two equivalent Ba(1)I6 octahedra. The corner-sharing octahedral tilt angles range from 45-52°. Sr(1) is bonded to one I(2), one I(3), and four equivalent I(1) atoms to form SrI6 octahedra that share corners with eight equivalent Ba(1)I6 octahedra and edges with two equivalent Sr(1)I6 octahedra. The corner-sharing octahedral tilt angles range from 45-52°. There are three inequivalent I sites. In the first I site, I(1) is bonded in a trigonal planar geometry to one Ba(1) and two equivalent Sr(1) atoms. In the second I site, I(2) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one Sr(1) atom. In the third I site, I(3) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one Sr(1) atom.
BaSrI4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Pnma space group. Ba(1) is bonded to two equivalent I(1), two equivalent I(2), and two equivalent I(3) atoms to form BaI6 octahedra that share corners with eight equivalent Sr(1)I6 octahedra and edges with two equivalent Ba(1)I6 octahedra. The corner-sharing octahedral tilt angles range from 45-52°. Both Ba(1)-I(1) bond lengths are 3.51 Å. There is one shorter (3.44 Å) and one longer (3.47 Å) Ba(1)-I(2) bond length. There is one shorter (3.44 Å) and one longer (3.46 Å) Ba(1)-I(3) bond length. Sr(1) is bonded to one I(2), one I(3), and four equivalent I(1) atoms to form SrI6 octahedra that share corners with eight equivalent Ba(1)I6 octahedra and edges with two equivalent Sr(1)I6 octahedra. The corner-sharing octahedral tilt angles range from 45-52°. The Sr(1)-I(2) bond length is 3.32 Å. The Sr(1)-I(3) bond length is 3.31 Å. There are two shorter (3.33 Å) and two longer (3.34 Å) Sr(1)-I(1) bond lengths. There are three inequivalent I sites. In the first I site, I(1) is bonded in a trigonal planar geometry to one Ba(1) and two equivalent Sr(1) atoms. In the second I site, I(2) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one Sr(1) atom. In the third I site, I(3) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one Sr(1) atom.