SrGaH4 crystallizes in the orthorhombic Pnma space group. Sr(1) is bonded in a 10-coordinate geometry to three equivalent H(2), three equivalent H(3), and four equivalent H(1) atoms. Ga(1) is bonded in a rectangular see-saw-like geometry to one H(2), one H(3), and two equivalent H(1) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sr(1) and one Ga(1) atom. In the second H site, H(2) is bonded to three equivalent Sr(1) and one Ga(1) atom to form a mixture of distorted edge and corner-sharing HSr3Ga trigonal pyramids. In the third H site, H(3) is bonded to three equivalent Sr(1) and one Ga(1) atom to form a mixture of distorted edge and corner-sharing HSr3Ga tetrahedra.
SrGaH4 crystallizes in the orthorhombic Pnma space group. Sr(1) is bonded in a 10-coordinate geometry to three equivalent H(2), three equivalent H(3), and four equivalent H(1) atoms. There is one shorter (2.48 Å) and two longer (2.72 Å) Sr(1)-H(2) bond lengths. There is one shorter (2.51 Å) and two longer (2.72 Å) Sr(1)-H(3) bond lengths. There are two shorter (2.45 Å) and two longer (2.48 Å) Sr(1)-H(1) bond lengths. Ga(1) is bonded in a rectangular see-saw-like geometry to one H(2), one H(3), and two equivalent H(1) atoms. The Ga(1)-H(2) bond length is 1.80 Å. The Ga(1)-H(3) bond length is 1.80 Å. Both Ga(1)-H(1) bond lengths are 1.65 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sr(1) and one Ga(1) atom. In the second H site, H(2) is bonded to three equivalent Sr(1) and one Ga(1) atom to form a mixture of distorted edge and corner-sharing HSr3Ga trigonal pyramids. In the third H site, H(3) is bonded to three equivalent Sr(1) and one Ga(1) atom to form a mixture of distorted edge and corner-sharing HSr3Ga tetrahedra.