Nd5As2O10Cl crystallizes in the monoclinic C2/m space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent Cl(1) atoms. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to two equivalent O(2), four equivalent O(1), and one Cl(1) atom. In the third Nd site, Nd(3) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. As(1) is bonded in a trigonal non-coplanar geometry to one O(3) and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Nd(1), one Nd(3), and two equivalent Nd(2) atoms to form ONd4 tetrahedra that share corners with four equivalent O(1)Nd4 tetrahedra, corners with six equivalent O(2)Nd3As tetrahedra, edges with two equivalent O(2)Nd3As tetrahedra, and edges with three equivalent O(1)Nd4 tetrahedra. In the second O site, O(2) is bonded to one Nd(1), one Nd(2), one Nd(3), and one As(1) atom to form distorted ONd3As tetrahedra that share corners with two equivalent O(2)Nd3As tetrahedra, corners with six equivalent O(1)Nd4 tetrahedra, edges with two equivalent O(2)Nd3As tetrahedra, and edges with two equivalent O(1)Nd4 tetrahedra. In the third O site, O(3) is bonded in a distorted T-shaped geometry to two equivalent Nd(1) and one As(1) atom. Cl(1) is bonded in a 6-coordinate geometry to two equivalent Nd(2) and four equivalent Nd(1) atoms.
Nd5As2O10Cl crystallizes in the monoclinic C2/m space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent Cl(1) atoms. Both Nd(1)-O(1) bond lengths are 2.31 Å. Both Nd(1)-O(2) bond lengths are 2.50 Å. There is one shorter (2.35 Å) and one longer (2.58 Å) Nd(1)-O(3) bond length. Both Nd(1)-Cl(1) bond lengths are 3.44 Å. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to two equivalent O(2), four equivalent O(1), and one Cl(1) atom. Both Nd(2)-O(2) bond lengths are 2.55 Å. There are two shorter (2.35 Å) and two longer (2.38 Å) Nd(2)-O(1) bond lengths. The Nd(2)-Cl(1) bond length is 3.48 Å. In the third Nd site, Nd(3) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. All Nd(3)-O(1) bond lengths are 2.45 Å. All Nd(3)-O(2) bond lengths are 2.55 Å. As(1) is bonded in a trigonal non-coplanar geometry to one O(3) and two equivalent O(2) atoms. The As(1)-O(3) bond length is 1.79 Å. Both As(1)-O(2) bond lengths are 1.83 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Nd(1), one Nd(3), and two equivalent Nd(2) atoms to form ONd4 tetrahedra that share corners with four equivalent O(1)Nd4 tetrahedra, corners with six equivalent O(2)Nd3As tetrahedra, edges with two equivalent O(2)Nd3As tetrahedra, and edges with three equivalent O(1)Nd4 tetrahedra. In the second O site, O(2) is bonded to one Nd(1), one Nd(2), one Nd(3), and one As(1) atom to form distorted ONd3As tetrahedra that share corners with two equivalent O(2)Nd3As tetrahedra, corners with six equivalent O(1)Nd4 tetrahedra, edges with two equivalent O(2)Nd3As tetrahedra, and edges with two equivalent O(1)Nd4 tetrahedra. In the third O site, O(3) is bonded in a distorted T-shaped geometry to two equivalent Nd(1) and one As(1) atom. Cl(1) is bonded in a 6-coordinate geometry to two equivalent Nd(2) and four equivalent Nd(1) atoms.