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BaCd is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ba is bonded in a body-centered cubic geometry to eight equivalent Cd atoms. All Ba–Cd bond lengths are 3.71 Å. Cd is bonded in a body-centered cubic geometry to eight equivalent Ba atoms.
BaCd(PO3)4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.72–3.11 Å. Cd2+ is bonded to six O2- atoms to form distorted CdO6 pentagonal pyramids that share corners with six PO4 tetrahedra. There are a spread of Cd–O bond distances ranging from 2.30–2.37 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CdO6 pentagonal pyramid and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.49–1.63 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CdO6 pentagonal pyramid and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.50–1.61 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent CdO6 pentagonal pyramids and corners with two PO4 tetrahedra. There is two shorter (1.50 Å) and two longer (1.61 Å) P–O bond length. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent CdO6 pentagonal pyramids and corners with two PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.51–1.61 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one Cd2+, and one P5+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two P5+ atoms. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one Cd2+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one Cd2+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to one Ba2+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to one Ba2+, one Cd2+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one Cd2+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Ba2+ and one P5+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two P5+ atoms. In the eleventh O2- site, O2- is bonded in a distorted single-bond geometry to one Ba2+, one Cd2+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two P5+ atoms.
BaCd(OCl)4 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Ba is bonded in a 8-coordinate geometry to two O and six Cl atoms. There are one shorter (3.36 Å) and one longer (3.40 Å) Ba–O bond lengths. There are a spread of Ba–Cl bond distances ranging from 3.05–3.78 Å. Cd is bonded to six Cl atoms to form edge-sharing CdCl6 octahedra. There are a spread of Cd–Cl bond distances ranging from 2.65–2.73 Å. There are four inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Ba and one O atom. The O–O bond length is 1.23 Å. In the second O site, O is bonded in a single-bond geometry to one O atom. In the third O site, O is bonded in a bent 150 degrees geometry to one Ba and one O atom. The O–O bond length is 1.23 Å. In the fourth O site, O is bonded in a single-bond geometry to one O atom. There are four inequivalent Cl sites. In the first Cl site, Cl is bonded in a distorted trigonal non-coplanar geometry to one Ba and two equivalent Cd atoms. In the second Cl site, Cl is bonded in a distorted trigonal non-coplanar geometry to one Ba and two equivalent Cd atoms. In the third Cl site, Cl is bonded in a distorted water-like geometry to two equivalent Ba and one Cd atom. In the fourth Cl site, Cl is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ba and one Cd atom.
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