LaMg2PdH7 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 4-coordinate geometry to one H(1), one H(2), one H(4), one H(6), and one H(7) atom. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to one H(2), one H(5), one H(6), one H(7), and two equivalent H(3) atoms. La(1) is bonded in a 12-coordinate geometry to one H(2), one H(3), two equivalent H(1), two equivalent H(4), two equivalent H(5), two equivalent H(6), and two equivalent H(7) atoms. Pd(1) is bonded in a distorted tetrahedral geometry to one H(1), one H(2), one H(3), and one H(4) atom. There are seven inequivalent H sites. In the first H site, H(6) is bonded in a distorted water-like geometry to one Mg(1), one Mg(2), and two equivalent La(1) atoms. In the second H site, H(7) is bonded to one Mg(1), one Mg(2), and two equivalent La(1) atoms to form distorted corner-sharing HLa2Mg2 tetrahedra. In the third H site, H(1) is bonded in a 1-coordinate geometry to one Mg(1), two equivalent La(1), and one Pd(1) atom. In the fourth H site, H(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), one La(1), and one Pd(1) atom. In the fifth H site, H(3) is bonded in a 4-coordinate geometry to two equivalent Mg(2), one La(1), and one Pd(1) atom. In the sixth H site, H(4) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent La(1), and one Pd(1) atom. In the seventh H site, H(5) is bonded in a distorted trigonal planar geometry to one Mg(2) and two equivalent La(1) atoms.
LaMg2PdH7 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 4-coordinate geometry to one H(1), one H(2), one H(4), one H(6), and one H(7) atom. The Mg(1)-H(1) bond length is 2.00 Å. The Mg(1)-H(2) bond length is 2.07 Å. The Mg(1)-H(4) bond length is 2.16 Å. The Mg(1)-H(6) bond length is 1.93 Å. The Mg(1)-H(7) bond length is 2.35 Å. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to one H(2), one H(5), one H(6), one H(7), and two equivalent H(3) atoms. The Mg(2)-H(2) bond length is 2.28 Å. The Mg(2)-H(5) bond length is 1.93 Å. The Mg(2)-H(6) bond length is 1.96 Å. The Mg(2)-H(7) bond length is 2.01 Å. There is one shorter (2.07 Å) and one longer (2.09 Å) Mg(2)-H(3) bond length. La(1) is bonded in a 12-coordinate geometry to one H(2), one H(3), two equivalent H(1), two equivalent H(4), two equivalent H(5), two equivalent H(6), and two equivalent H(7) atoms. The La(1)-H(2) bond length is 2.49 Å. The La(1)-H(3) bond length is 2.86 Å. There is one shorter (2.48 Å) and one longer (2.78 Å) La(1)-H(1) bond length. There is one shorter (2.57 Å) and one longer (2.72 Å) La(1)-H(4) bond length. There is one shorter (2.33 Å) and one longer (2.39 Å) La(1)-H(5) bond length. There is one shorter (2.47 Å) and one longer (2.68 Å) La(1)-H(6) bond length. There is one shorter (2.37 Å) and one longer (2.41 Å) La(1)-H(7) bond length. Pd(1) is bonded in a distorted tetrahedral geometry to one H(1), one H(2), one H(3), and one H(4) atom. The Pd(1)-H(1) bond length is 1.73 Å. The Pd(1)-H(2) bond length is 1.76 Å. The Pd(1)-H(3) bond length is 1.73 Å. The Pd(1)-H(4) bond length is 1.74 Å. There are seven inequivalent H sites. In the first H site, H(6) is bonded in a distorted water-like geometry to one Mg(1), one Mg(2), and two equivalent La(1) atoms. In the second H site, H(7) is bonded to one Mg(1), one Mg(2), and two equivalent La(1) atoms to form distorted corner-sharing HLa2Mg2 tetrahedra. In the third H site, H(1) is bonded in a 1-coordinate geometry to one Mg(1), two equivalent La(1), and one Pd(1) atom. In the fourth H site, H(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), one La(1), and one Pd(1) atom. In the fifth H site, H(3) is bonded in a 4-coordinate geometry to two equivalent Mg(2), one La(1), and one Pd(1) atom. In the sixth H site, H(4) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent La(1), and one Pd(1) atom. In the seventh H site, H(5) is bonded in a distorted trigonal planar geometry to one Mg(2) and two equivalent La(1) atoms.