The two mixed halides of barium, barium chloroiodide and barium bromoiodide, were synthesized via a solid-state reaction route. In this article, their powder XRD data are reported. A careful analysis of the X-ray data shows that both BaClI and BaBrI crystallize in the orthorhombic structure. The lattice parameters obtained are a=17.841±0.003 Å, b=8.441±0.001 Å and c=5.642±0.001 Å for BaClI (SG. Pbam, No. 55) and a=13.667±0.002 Å, b=12.012±0.001 Å and c=10.871±0.002 Å for BaBrI (SG. P2221 No. 17).
