Nd2Mn3Cu9As7 crystallizes in the hexagonal P-6 space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 18-coordinate geometry to three equivalent Cu(1), three equivalent Cu(2), six equivalent Cu(3), and six equivalent As(2) atoms. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to three equivalent Cu(3) and six equivalent As(1) atoms. Mn(1) is bonded in a 12-coordinate geometry to one Cu(3), two equivalent Cu(1), four equivalent Cu(2), one As(2), two equivalent As(1), and two equivalent As(3) atoms. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one Nd(1), two equivalent Mn(1), two equivalent Cu(3), two equivalent As(1), and two equivalent As(2) atoms to form a mixture of distorted face and corner-sharing CuNdMn2Cu2As4 tetrahedra. In the second Cu site, Cu(2) is bonded in a 4-coordinate geometry to one Nd(1), four equivalent Mn(1), two equivalent Cu(3), one As(1), one As(3), and two equivalent As(2) atoms. In the third Cu site, Cu(3) is bonded in a 12-coordinate geometry to one Nd(2), two equivalent Nd(1), one Mn(1), two equivalent Cu(1), two equivalent Cu(2), two equivalent As(1), and two equivalent As(2) atoms. There are three inequivalent As sites. In the first As site, As(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Mn(1), one Cu(2), two equivalent Cu(1), and two equivalent Cu(3) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Nd(1), one Mn(1), two equivalent Cu(1), two equivalent Cu(2), and two equivalent Cu(3) atoms. In the third As site, As(3) is bonded in a 9-coordinate geometry to six equivalent Mn(1) and three equivalent Cu(2) atoms.
Nd2Mn3Cu9As7 crystallizes in the hexagonal P-6 space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 18-coordinate geometry to three equivalent Cu(1), three equivalent Cu(2), six equivalent Cu(3), and six equivalent As(2) atoms. All Nd(1)-Cu(1) bond lengths are 3.41 Å. All Nd(1)-Cu(2) bond lengths are 3.30 Å. All Nd(1)-Cu(3) bond lengths are 3.33 Å. All Nd(1)-As(2) bond lengths are 3.07 Å. In the second Nd site, Nd(2) is bonded in a 6-coordinate geometry to three equivalent Cu(3) and six equivalent As(1) atoms. All Nd(2)-Cu(3) bond lengths are 3.36 Å. All Nd(2)-As(1) bond lengths are 3.04 Å. Mn(1) is bonded in a 12-coordinate geometry to one Cu(3), two equivalent Cu(1), four equivalent Cu(2), one As(2), two equivalent As(1), and two equivalent As(3) atoms. The Mn(1)-Cu(3) bond length is 2.82 Å. Both Mn(1)-Cu(1) bond lengths are 3.04 Å. There are two shorter (2.96 Å) and two longer (3.00 Å) Mn(1)-Cu(2) bond lengths. The Mn(1)-As(2) bond length is 2.58 Å. Both Mn(1)-As(1) bond lengths are 2.79 Å. Both Mn(1)-As(3) bond lengths are 2.75 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one Nd(1), two equivalent Mn(1), two equivalent Cu(3), two equivalent As(1), and two equivalent As(2) atoms to form a mixture of distorted face and corner-sharing CuNdMn2Cu2As4 tetrahedra. Both Cu(1)-Cu(3) bond lengths are 2.89 Å. There is one shorter (2.47 Å) and one longer (2.51 Å) Cu(1)-As(1) bond length. Both Cu(1)-As(2) bond lengths are 2.50 Å. In the second Cu site, Cu(2) is bonded in a 4-coordinate geometry to one Nd(1), four equivalent Mn(1), two equivalent Cu(3), one As(1), one As(3), and two equivalent As(2) atoms. Both Cu(2)-Cu(3) bond lengths are 2.76 Å. The Cu(2)-As(1) bond length is 2.47 Å. The Cu(2)-As(3) bond length is 2.44 Å. Both Cu(2)-As(2) bond lengths are 2.52 Å. In the third Cu site, Cu(3) is bonded in a 12-coordinate geometry to one Nd(2), two equivalent Nd(1), one Mn(1), two equivalent Cu(1), two equivalent Cu(2), two equivalent As(1), and two equivalent As(2) atoms. Both Cu(3)-As(1) bond lengths are 2.50 Å. There is one shorter (2.50 Å) and one longer (2.53 Å) Cu(3)-As(2) bond length. There are three inequivalent As sites. In the first As site, As(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), two equivalent Mn(1), one Cu(2), two equivalent Cu(1), and two equivalent Cu(3) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Nd(1), one Mn(1), two equivalent Cu(1), two equivalent Cu(2), and two equivalent Cu(3) atoms. In the third As site, As(3) is bonded in a 9-coordinate geometry to six equivalent Mn(1) and three equivalent Cu(2) atoms.