Materials Data on BaO4 by Materials Project

BaO4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba is bonded in a 10-coordinate geometry to ten O atoms. There are a spread of Ba–O bond distances ranging from 2.72–3.21 Å. There are four inequivalent O sites. In the first O site, O is bonded to three equivalent Ba and one O atom to form a mixture of edge and corner-sharing OBa3O tetrahedra. The O–O bond length is 1.38 Å. In the second O site, O is bonded in a 3-coordinate geometry to two equivalent Ba and one O atom. The O–O bond length is 1.33 Å. In the third O site, O is bonded in a 4-coordinate geometry to three equivalent Ba and one O atom. In the fourth O site, O is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ba and one O atom.