Sr2PdH4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one H(2), two equivalent H(1), and two equivalent H(3) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to two equivalent H(1), three equivalent H(2), and four equivalent H(3) atoms. Pd(1) is bonded in a tetrahedral geometry to one H(1), one H(2), and two equivalent H(3) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and one Pd(1) atom to form a mixture of edge and corner-sharing HSr4Pd square pyramids. In the second H site, H(2) is bonded to one Sr(1), three equivalent Sr(2), and one Pd(1) atom to form a mixture of edge and corner-sharing HSr4Pd trigonal bipyramids. In the third H site, H(3) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Sr(2), and one Pd(1) atom.
Sr2PdH4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one H(2), two equivalent H(1), and two equivalent H(3) atoms. The Sr(1)-H(2) bond length is 2.74 Å. Both Sr(1)-H(1) bond lengths are 2.77 Å. Both Sr(1)-H(3) bond lengths are 2.78 Å. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to two equivalent H(1), three equivalent H(2), and four equivalent H(3) atoms. There is one shorter (2.67 Å) and one longer (2.68 Å) Sr(2)-H(1) bond length. There is one shorter (2.63 Å) and two longer (2.84 Å) Sr(2)-H(2) bond lengths. There are two shorter (2.54 Å) and two longer (2.74 Å) Sr(2)-H(3) bond lengths. Pd(1) is bonded in a tetrahedral geometry to one H(1), one H(2), and two equivalent H(3) atoms. The Pd(1)-H(1) bond length is 1.81 Å. The Pd(1)-H(2) bond length is 1.78 Å. Both Pd(1)-H(3) bond lengths are 1.76 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and one Pd(1) atom to form a mixture of edge and corner-sharing HSr4Pd square pyramids. In the second H site, H(2) is bonded to one Sr(1), three equivalent Sr(2), and one Pd(1) atom to form a mixture of edge and corner-sharing HSr4Pd trigonal bipyramids. In the third H site, H(3) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Sr(2), and one Pd(1) atom.