BaGaH5 crystallizes in the monoclinic P2_1 space group. Ba(1) is bonded in a 11-coordinate geometry to one H(4), two equivalent H(1), two equivalent H(2), two equivalent H(3), and four equivalent H(5) atoms. Ga(1) is bonded in a tetrahedral geometry to one H(1), one H(2), one H(3), and one H(4) atom. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to two equivalent Ba(1) and one Ga(1) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one Ga(1) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one Ga(1) atom. In the fourth H site, H(4) is bonded in a distorted single-bond geometry to one Ba(1) and one Ga(1) atom. In the fifth H site, H(5) is bonded to four equivalent Ba(1) atoms to form a mixture of corner and edge-sharing HBa4 tetrahedra.
BaGaH5 crystallizes in the monoclinic P2_1 space group. Ba(1) is bonded in a 11-coordinate geometry to one H(4), two equivalent H(1), two equivalent H(2), two equivalent H(3), and four equivalent H(5) atoms. The Ba(1)-H(4) bond length is 2.70 Å. Both Ba(1)-H(1) bond lengths are 2.97 Å. There is one shorter (2.68 Å) and one longer (2.81 Å) Ba(1)-H(2) bond length. There is one shorter (2.68 Å) and one longer (2.80 Å) Ba(1)-H(3) bond length. There are a spread of Ba(1)-H(5) bond distances ranging from 2.75-2.80 Å. Ga(1) is bonded in a tetrahedral geometry to one H(1), one H(2), one H(3), and one H(4) atom. The Ga(1)-H(1) bond length is 1.59 Å. The Ga(1)-H(2) bond length is 1.60 Å. The Ga(1)-H(3) bond length is 1.59 Å. The Ga(1)-H(4) bond length is 1.56 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to two equivalent Ba(1) and one Ga(1) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one Ga(1) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one Ga(1) atom. In the fourth H site, H(4) is bonded in a distorted single-bond geometry to one Ba(1) and one Ga(1) atom. In the fifth H site, H(5) is bonded to four equivalent Ba(1) atoms to form a mixture of corner and edge-sharing HBa4 tetrahedra.