Ba3SrI8 is Fluorite-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a body-centered cubic geometry to eight equivalent I(1) atoms. In the second Ba site, Ba(2) is bonded in a body-centered cubic geometry to eight equivalent I(1) atoms. Sr(1) is bonded in a body-centered cubic geometry to eight equivalent I(1) atoms. I(1) is bonded to one Ba(2), two equivalent Ba(1), and one Sr(1) atom to form a mixture of corner and edge-sharing IBa3Sr tetrahedra.
Ba3SrI8 is Fluorite-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a body-centered cubic geometry to eight equivalent I(1) atoms. All Ba(1)-I(1) bond lengths are 3.60 Å. In the second Ba site, Ba(2) is bonded in a body-centered cubic geometry to eight equivalent I(1) atoms. All Ba(2)-I(1) bond lengths are 3.61 Å. Sr(1) is bonded in a body-centered cubic geometry to eight equivalent I(1) atoms. All Sr(1)-I(1) bond lengths are 3.52 Å. I(1) is bonded to one Ba(2), two equivalent Ba(1), and one Sr(1) atom to form a mixture of corner and edge-sharing IBa3Sr tetrahedra.