BaSrI4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Pna2_1 space group. Ba(1) is bonded to one I(1), one I(2), two equivalent I(3), and two equivalent I(4) 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 40-56°. Sr(1) is bonded to one I(3), one I(4), two equivalent I(1), and two equivalent I(2) 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 40-56°. There are four 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 trigonal planar geometry to one Ba(1) and two equivalent Sr(1) atoms. 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. In the fourth I site, I(4) 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 Pna2_1 space group. Ba(1) is bonded to one I(1), one I(2), two equivalent I(3), and two equivalent I(4) 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 40-56°. The Ba(1)-I(1) bond length is 3.49 Å. The Ba(1)-I(2) bond length is 3.49 Å. There is one shorter (3.44 Å) and one longer (3.46 Å) Ba(1)-I(3) bond length. Both Ba(1)-I(4) bond lengths are 3.44 Å. Sr(1) is bonded to one I(3), one I(4), two equivalent I(1), and two equivalent I(2) 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 40-56°. The Sr(1)-I(3) bond length is 3.31 Å. The Sr(1)-I(4) bond length is 3.30 Å. There is one shorter (3.31 Å) and one longer (3.35 Å) Sr(1)-I(1) bond length. There is one shorter (3.32 Å) and one longer (3.34 Å) Sr(1)-I(2) bond length. There are four 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 trigonal planar geometry to one Ba(1) and two equivalent Sr(1) atoms. 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. In the fourth I site, I(4) is bonded in a distorted trigonal planar geometry to two equivalent Ba(1) and one Sr(1) atom.