BaReH9 crystallizes in the trigonal R32 space group. Ba(1) is bonded in a 18-coordinate geometry to six equivalent H(1) and twelve equivalent H(2) atoms. Re(1) is bonded in a 9-coordinate geometry to three equivalent H(1) and six equivalent H(2) atoms. There are two inequivalent H sites. In the first H site, H(2) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one Re(1) atom. In the second H site, H(1) is bonded in a single-bond geometry to two equivalent Ba(1) and one Re(1) atom.
BaReH9 crystallizes in the trigonal R32 space group. Ba(1) is bonded in a 18-coordinate geometry to six equivalent H(1) and twelve equivalent H(2) atoms. All Ba(1)-H(1) bond lengths are 3.04 Å. There are six shorter (2.82 Å) and six longer (3.05 Å) Ba(1)-H(2) bond lengths. Re(1) is bonded in a 9-coordinate geometry to three equivalent H(1) and six equivalent H(2) atoms. All Re(1)-H(1) bond lengths are 1.68 Å. All Re(1)-H(2) bond lengths are 1.70 Å. There are two inequivalent H sites. In the first H site, H(2) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one Re(1) atom. In the second H site, H(1) is bonded in a single-bond geometry to two equivalent Ba(1) and one Re(1) atom.