DOE OSTI2020
Ba3(OCl)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are six inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 5-coordinate geometry to two O2- and three Cl1- atoms. There are one shorter (2.47 Å) and one longer (2.49 Å) Ba–O bond lengths. There are a spread of Ba–Cl bond distances ranging from 3.16–3.61 Å. In the second Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to three O2- and three Cl1- atoms. There are a spread of Ba–O bond distances ranging from 2.55–2.69 Å. There are a spread of Ba–Cl bond distances ranging from 3.38–3.78 Å. In the third Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to three O2- and three Cl1- atoms. There are a spread of Ba–O bond distances ranging from 2.52–2.65 Å. There are a spread of Ba–Cl bond distances ranging from 3.32–3.55 Å. In the fourth Ba2+ site, Ba2+ is bonded in a 3-coordinate geometry to three O2- and three Cl1- atoms. There are a spread of Ba–O bond distances ranging from 2.52–2.64 Å. There are a spread of Ba–Cl bond distances ranging from 3.42–3.87 Å. In the fifth Ba2+ site, Ba2+ is bonded in a 2-coordinate geometry to two O2- and four Cl1- atoms. There are one shorter (2.51 Å) and one longer (2.54 Å) Ba–O bond lengths. There are a spread of Ba–Cl bond distances ranging from 3.26–3.56 Å. In the sixth Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to three O2- and three Cl1- atoms. There are a spread of Ba–O bond distances ranging from 2.50–2.65 Å. There are a spread of Ba–Cl bond distances ranging from 3.27–3.41 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to four Ba2+ atoms to form a mixture of distorted corner and edge-sharing OBa4 tetrahedra. In the second O2- site, O2- is bonded to four Ba2+ atoms to form a mixture of corner and edge-sharing OBa4 tetrahedra. In the third O2- site, O2- is bonded to four Ba2+ atoms to form a mixture of corner and edge-sharing OBa4 tetrahedra. In the fourth O2- site, O2- is bonded to four Ba2+ atoms to form a mixture of corner and edge-sharing OBa4 tetrahedra. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 5-coordinate geometry to five Ba2+ atoms. In the second Cl1- site, Cl1- is bonded in a 5-coordinate geometry to five Ba2+ atoms. In the third Cl1- site, Cl1- is bonded in a 5-coordinate geometry to five Ba2+ atoms. In the fourth Cl1- site, Cl1- is bonded in a 4-coordinate geometry to four Ba2+ atoms.