La2Al(Ni3H4)3 crystallizes in the orthorhombic Cmmm space group. La(1) is bonded in a 10-coordinate geometry to two equivalent H(2), four equivalent H(1), and four equivalent H(3) atoms. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a distorted single-bond geometry to one Al(1) atom. In the second Ni site, Ni(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent H(1) and two equivalent H(2) atoms. In the third Ni site, Ni(3) is bonded in a distorted rectangular see-saw-like geometry to four equivalent H(1) atoms. In the fourth Ni site, Ni(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent H(3) and two equivalent H(4) atoms. Al(1) is bonded in a distorted body-centered cubic geometry to four equivalent Ni(1) and four equivalent H(3) atoms. There are four inequivalent H sites. In the first H site, H(4) is bonded in a bent 150 degrees geometry to two equivalent Ni(4) atoms. In the second H site, H(1) is bonded in a distorted bent 120 degrees geometry to two equivalent La(1), one Ni(2), and one Ni(3) atom. In the third H site, H(2) is bonded in a 2-coordinate geometry to two equivalent La(1) and two equivalent Ni(2) atoms. In the fourth H site, H(3) is bonded to two equivalent La(1), one Ni(4), and one Al(1) atom to form a mixture of distorted edge, face, and corner-sharing HLa2AlNi tetrahedra.
La2Al(Ni3H4)3 crystallizes in the orthorhombic Cmmm space group. La(1) is bonded in a 10-coordinate geometry to two equivalent H(2), four equivalent H(1), and four equivalent H(3) atoms. Both La(1)-H(2) bond lengths are 2.63 Å. All La(1)-H(1) bond lengths are 2.66 Å. All La(1)-H(3) bond lengths are 2.46 Å. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a distorted single-bond geometry to one Al(1) atom. The Ni(1)-Al(1) bond length is 2.42 Å. In the second Ni site, Ni(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent H(1) and two equivalent H(2) atoms. Both Ni(2)-H(1) bond lengths are 1.56 Å. Both Ni(2)-H(2) bond lengths are 1.61 Å. In the third Ni site, Ni(3) is bonded in a distorted rectangular see-saw-like geometry to four equivalent H(1) atoms. All Ni(3)-H(1) bond lengths are 1.59 Å. In the fourth Ni site, Ni(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent H(3) and two equivalent H(4) atoms. Both Ni(4)-H(3) bond lengths are 1.56 Å. Both Ni(4)-H(4) bond lengths are 1.56 Å. Al(1) is bonded in a distorted body-centered cubic geometry to four equivalent Ni(1) and four equivalent H(3) atoms. All Al(1)-H(3) bond lengths are 1.90 Å. There are four inequivalent H sites. In the first H site, H(4) is bonded in a bent 150 degrees geometry to two equivalent Ni(4) atoms. In the second H site, H(1) is bonded in a distorted bent 120 degrees geometry to two equivalent La(1), one Ni(2), and one Ni(3) atom. In the third H site, H(2) is bonded in a 2-coordinate geometry to two equivalent La(1) and two equivalent Ni(2) atoms. In the fourth H site, H(3) is bonded to two equivalent La(1), one Ni(4), and one Al(1) atom to form a mixture of distorted edge, face, and corner-sharing HLa2AlNi tetrahedra.