Nd6Cd5Si7 crystallizes in the monoclinic Cm space group. There are six inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 9-coordinate geometry to one Cd(1), two equivalent Cd(3), two equivalent Si(1), two equivalent Si(5), and three equivalent Si(4) atoms. In the second Nd site, Nd(2) is bonded in a 11-coordinate geometry to one Cd(2), two equivalent Cd(1), three equivalent Cd(4), two equivalent Si(6), and three equivalent Si(2) atoms. In the third Nd site, Nd(3) is bonded in a 11-coordinate geometry to one Cd(3), two equivalent Cd(2), three equivalent Cd(5), two equivalent Si(7), and three equivalent Si(3) atoms. In the fourth Nd site, Nd(4) is bonded in a 12-coordinate geometry to one Cd(5), three equivalent Cd(3), one Si(4), two equivalent Si(1), two equivalent Si(3), and three equivalent Si(7) atoms. In the fifth Nd site, Nd(5) is bonded in a 10-coordinate geometry to two equivalent Cd(4), three equivalent Cd(1), one Si(1), two equivalent Si(4), and three equivalent Si(5) atoms. In the sixth Nd site, Nd(6) is bonded in a 11-coordinate geometry to one Cd(4), two equivalent Cd(5), three equivalent Cd(2), two equivalent Si(2), and three equivalent Si(6) atoms. There are five inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 12-coordinate geometry to one Nd(1), two equivalent Nd(2), three equivalent Nd(5), three equivalent Cd(4), one Si(2), and two equivalent Si(5) atoms. In the second Cd site, Cd(2) is bonded in a 12-coordinate geometry to one Nd(2), two equivalent Nd(3), three equivalent Nd(6), three equivalent Cd(5), one Si(3), and two equivalent Si(6) atoms. In the third Cd site, Cd(3) is bonded in a 10-coordinate geometry to one Nd(3), two equivalent Nd(1), three equivalent Nd(4), one Si(1), one Si(4), and two equivalent Si(7) atoms. In the fourth Cd site, Cd(4) is bonded in a 3-coordinate geometry to one Nd(6), two equivalent Nd(5), three equivalent Nd(2), three equivalent Cd(1), one Si(5), and two equivalent Si(2) atoms. In the fifth Cd site, Cd(5) is bonded in a 7-coordinate geometry to one Nd(4), two equivalent Nd(6), three equivalent Nd(3), three equivalent Cd(2), one Si(6), and two equivalent Si(3) atoms. There are seven inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to one Nd(5), two equivalent Nd(1), two equivalent Nd(4), one Cd(3), and two equivalent Si(4) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Nd(6), three equivalent Nd(2), one Cd(1), two equivalent Cd(4), and one Si(6) atom. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Nd(4), three equivalent Nd(3), one Cd(2), two equivalent Cd(5), and one Si(7) atom. In the fourth Si site, Si(4) is bonded in a 10-coordinate geometry to one Nd(4), two equivalent Nd(5), three equivalent Nd(1), one Cd(3), one Si(5), and two equivalent Si(1) atoms. In the fifth Si site, Si(5) is bonded in a 9-coordinate geometry to two equivalent Nd(1), three equivalent Nd(5), one Cd(4), two equivalent Cd(1), and one Si(4) atom. In the sixth Si site, Si(6) is bonded in a 9-coordinate geometry to two equivalent Nd(2), three equivalent Nd(6), one Cd(5), two equivalent Cd(2), and one Si(2) atom. In the seventh Si site, Si(7) is bonded in a 8-coordinate geometry to two equivalent Nd(3), three equivalent Nd(4), two equivalent Cd(3), and one Si(3) atom.
Nd6Cd5Si7 crystallizes in the monoclinic Cm space group. There are six inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 9-coordinate geometry to one Cd(1), two equivalent Cd(3), two equivalent Si(1), two equivalent Si(5), and three equivalent Si(4) atoms. The Nd(1)-Cd(1) bond length is 3.47 Å. Both Nd(1)-Cd(3) bond lengths are 3.24 Å. Both Nd(1)-Si(1) bond lengths are 3.15 Å. Both Nd(1)-Si(5) bond lengths are 3.08 Å. There is one shorter (3.07 Å) and two longer (3.25 Å) Nd(1)-Si(4) bond lengths. In the second Nd site, Nd(2) is bonded in a 11-coordinate geometry to one Cd(2), two equivalent Cd(1), three equivalent Cd(4), two equivalent Si(6), and three equivalent Si(2) atoms. The Nd(2)-Cd(2) bond length is 3.48 Å. Both Nd(2)-Cd(1) bond lengths are 3.30 Å. There are two shorter (3.41 Å) and one longer (3.54 Å) Nd(2)-Cd(4) bond length. Both Nd(2)-Si(6) bond lengths are 3.05 Å. There is one shorter (3.14 Å) and two longer (3.19 Å) Nd(2)-Si(2) bond lengths. In the third Nd site, Nd(3) is bonded in a 11-coordinate geometry to one Cd(3), two equivalent Cd(2), three equivalent Cd(5), two equivalent Si(7), and three equivalent Si(3) atoms. The Nd(3)-Cd(3) bond length is 3.34 Å. Both Nd(3)-Cd(2) bond lengths are 3.34 Å. There are two shorter (3.36 Å) and one longer (3.56 Å) Nd(3)-Cd(5) bond length. Both Nd(3)-Si(7) bond lengths are 3.01 Å. There is one shorter (3.11 Å) and two longer (3.21 Å) Nd(3)-Si(3) bond lengths. In the fourth Nd site, Nd(4) is bonded in a 12-coordinate geometry to one Cd(5), three equivalent Cd(3), one Si(4), two equivalent Si(1), two equivalent Si(3), and three equivalent Si(7) atoms. The Nd(4)-Cd(5) bond length is 3.58 Å. There is one shorter (3.33 Å) and two longer (3.37 Å) Nd(4)-Cd(3) bond lengths. The Nd(4)-Si(4) bond length is 3.48 Å. Both Nd(4)-Si(1) bond lengths are 3.21 Å. Both Nd(4)-Si(3) bond lengths are 3.10 Å. There is one shorter (3.14 Å) and two longer (3.21 Å) Nd(4)-Si(7) bond lengths. In the fifth Nd site, Nd(5) is bonded in a 10-coordinate geometry to two equivalent Cd(4), three equivalent Cd(1), one Si(1), two equivalent Si(4), and three equivalent Si(5) atoms. Both Nd(5)-Cd(4) bond lengths are 3.38 Å. There are two shorter (3.43 Å) and one longer (3.61 Å) Nd(5)-Cd(1) bond length. The Nd(5)-Si(1) bond length is 3.07 Å. Both Nd(5)-Si(4) bond lengths are 3.13 Å. There is one shorter (3.16 Å) and two longer (3.17 Å) Nd(5)-Si(5) bond lengths. In the sixth Nd site, Nd(6) is bonded in a 11-coordinate geometry to one Cd(4), two equivalent Cd(5), three equivalent Cd(2), two equivalent Si(2), and three equivalent Si(6) atoms. The Nd(6)-Cd(4) bond length is 3.49 Å. Both Nd(6)-Cd(5) bond lengths are 3.37 Å. There are two shorter (3.40 Å) and one longer (3.55 Å) Nd(6)-Cd(2) bond length. Both Nd(6)-Si(2) bond lengths are 3.06 Å. There is one shorter (3.14 Å) and two longer (3.19 Å) Nd(6)-Si(6) bond lengths. There are five inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 12-coordinate geometry to one Nd(1), two equivalent Nd(2), three equivalent Nd(5), three equivalent Cd(4), one Si(2), and two equivalent Si(5) atoms. There is one shorter (3.15 Å) and two longer (3.43 Å) Cd(1)-Cd(4) bond lengths. The Cd(1)-Si(2) bond length is 2.90 Å. Both Cd(1)-Si(5) bond lengths are 2.75 Å. In the second Cd site, Cd(2) is bonded in a 12-coordinate geometry to one Nd(2), two equivalent Nd(3), three equivalent Nd(6), three equivalent Cd(5), one Si(3), and two equivalent Si(6) atoms. There is one shorter (3.29 Å) and two longer (3.36 Å) Cd(2)-Cd(5) bond lengths. The Cd(2)-Si(3) bond length is 2.87 Å. Both Cd(2)-Si(6) bond lengths are 2.77 Å. In the third Cd site, Cd(3) is bonded in a 10-coordinate geometry to one Nd(3), two equivalent Nd(1), three equivalent Nd(4), one Si(1), one Si(4), and two equivalent Si(7) atoms. The Cd(3)-Si(1) bond length is 2.84 Å. The Cd(3)-Si(4) bond length is 2.85 Å. Both Cd(3)-Si(7) bond lengths are 2.67 Å. In the fourth Cd site, Cd(4) is bonded in a 3-coordinate geometry to one Nd(6), two equivalent Nd(5), three equivalent Nd(2), three equivalent Cd(1), one Si(5), and two equivalent Si(2) atoms. The Cd(4)-Si(5) bond length is 2.81 Å. Both Cd(4)-Si(2) bond lengths are 2.76 Å. In the fifth Cd site, Cd(5) is bonded in a 7-coordinate geometry to one Nd(4), two equivalent Nd(6), three equivalent Nd(3), three equivalent Cd(2), one Si(6), and two equivalent Si(3) atoms. The Cd(5)-Si(6) bond length is 2.88 Å. Both Cd(5)-Si(3) bond lengths are 2.77 Å. There are seven inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to one Nd(5), two equivalent Nd(1), two equivalent Nd(4), one Cd(3), and two equivalent Si(4) atoms. Both Si(1)-Si(4) bond lengths are 2.56 Å. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Nd(6), three equivalent Nd(2), one Cd(1), two equivalent Cd(4), and one Si(6) atom. The Si(2)-Si(6) bond length is 2.50 Å. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent Nd(4), three equivalent Nd(3), one Cd(2), two equivalent Cd(5), and one Si(7) atom. The Si(3)-Si(7) bond length is 2.49 Å. In the fourth Si site, Si(4) is bonded in a 10-coordinate geometry to one Nd(4), two equivalent Nd(5), three equivalent Nd(1), one Cd(3), one Si(5), and two equivalent Si(1) atoms. The Si(4)-Si(5) bond length is 2.81 Å. In the fifth Si site, Si(5) is bonded in a 9-coordinate geometry to two equivalent Nd(1), three equivalent Nd(5), one Cd(4), two equivalent Cd(1), and one Si(4) atom. In the sixth Si site, Si(6) is bonded in a 9-coordinate geometry to two equivalent Nd(2), three equivalent Nd(6), one Cd(5), two equivalent Cd(2), and one Si(2) atom. In the seventh Si site, Si(7) is bonded in a 8-coordinate geometry to two equivalent Nd(3), three equivalent Nd(4), two equivalent Cd(3), and one Si(3) atom.