Gd3Pd7P4 crystallizes in the monoclinic C2/m space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 14-coordinate geometry to two equivalent Pd(2), two equivalent Pd(4), three equivalent Pd(1), three equivalent Pd(3), two equivalent P(1), and two equivalent P(2) atoms. In the second Gd site, Gd(2) is bonded in a 6-coordinate geometry to two equivalent Pd(3), four equivalent Pd(1), four equivalent Pd(2), two equivalent P(2), and four equivalent P(1) atoms. There are four inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 12-coordinate geometry to two equivalent Gd(2), three equivalent Gd(1), one Pd(2), two equivalent Pd(1), one P(1), and three equivalent P(2) atoms. In the second Pd site, Pd(2) is bonded to two equivalent Gd(1), two equivalent Gd(2), one Pd(1), two equivalent Pd(3), two equivalent Pd(4), one P(1), and two equivalent P(2) atoms to form distorted PdGd4P3Pd5 cuboctahedra that share corners with four equivalent Pd(2)Gd4P3Pd5 cuboctahedra,  an edgeedge with one Pd(2)Gd4P3Pd5 cuboctahedra, faces with two equivalent Pd(4)Gd4P2Pd6 cuboctahedra, and faces with three equivalent Pd(2)Gd4P3Pd5 cuboctahedra. In the third Pd site, Pd(3) is bonded in a 12-coordinate geometry to one Gd(2), three equivalent Gd(1), one Pd(4), two equivalent Pd(2), two equivalent Pd(3), and three equivalent P(1) atoms. In the fourth Pd site, Pd(4) is bonded to four equivalent Gd(1), two equivalent Pd(3), four equivalent Pd(2), and two equivalent P(2) atoms to form distorted PdGd4P2Pd6 cuboctahedra that share faces with two equivalent Pd(4)Gd4P2Pd6 cuboctahedra and faces with four equivalent Pd(2)Gd4P3Pd5 cuboctahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Gd(1), two equivalent Gd(2), one Pd(1), one Pd(2), and three equivalent Pd(3) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to one Gd(2), two equivalent Gd(1), one Pd(4), two equivalent Pd(2), and three equivalent Pd(1) atoms.
Gd3Pd7P4 crystallizes in the monoclinic C2/m space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 14-coordinate geometry to two equivalent Pd(2), two equivalent Pd(4), three equivalent Pd(1), three equivalent Pd(3), two equivalent P(1), and two equivalent P(2) atoms. There is one shorter (3.05 Å) and one longer (3.17 Å) Gd(1)-Pd(2) bond length. Both Gd(1)-Pd(4) bond lengths are 3.02 Å. There are two shorter (3.02 Å) and one longer (3.20 Å) Gd(1)-Pd(1) bond length. There is one shorter (2.97 Å) and two longer (3.06 Å) Gd(1)-Pd(3) bond lengths. Both Gd(1)-P(1) bond lengths are 2.95 Å. Both Gd(1)-P(2) bond lengths are 2.99 Å. In the second Gd site, Gd(2) is bonded in a 6-coordinate geometry to two equivalent Pd(3), four equivalent Pd(1), four equivalent Pd(2), two equivalent P(2), and four equivalent P(1) atoms. Both Gd(2)-Pd(3) bond lengths are 3.22 Å. All Gd(2)-Pd(1) bond lengths are 3.49 Å. All Gd(2)-Pd(2) bond lengths are 3.27 Å. Both Gd(2)-P(2) bond lengths are 2.97 Å. All Gd(2)-P(1) bond lengths are 2.98 Å. There are four inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 12-coordinate geometry to two equivalent Gd(2), three equivalent Gd(1), one Pd(2), two equivalent Pd(1), one P(1), and three equivalent P(2) atoms. The Pd(1)-Pd(2) bond length is 2.79 Å. Both Pd(1)-Pd(1) bond lengths are 2.88 Å. The Pd(1)-P(1) bond length is 2.49 Å. There is one shorter (2.52 Å) and two longer (2.58 Å) Pd(1)-P(2) bond lengths. In the second Pd site, Pd(2) is bonded to two equivalent Gd(1), two equivalent Gd(2), one Pd(1), two equivalent Pd(3), two equivalent Pd(4), one P(1), and two equivalent P(2) atoms to form distorted PdGd4P3Pd5 cuboctahedra that share corners with four equivalent Pd(2)Gd4P3Pd5 cuboctahedra,  an edgeedge with one Pd(2)Gd4P3Pd5 cuboctahedra, faces with two equivalent Pd(4)Gd4P2Pd6 cuboctahedra, and faces with three equivalent Pd(2)Gd4P3Pd5 cuboctahedra. Both Pd(2)-Pd(3) bond lengths are 2.81 Å. Both Pd(2)-Pd(4) bond lengths are 2.93 Å. The Pd(2)-P(1) bond length is 2.47 Å. Both Pd(2)-P(2) bond lengths are 2.47 Å. In the third Pd site, Pd(3) is bonded in a 12-coordinate geometry to one Gd(2), three equivalent Gd(1), one Pd(4), two equivalent Pd(2), two equivalent Pd(3), and three equivalent P(1) atoms. The Pd(3)-Pd(4) bond length is 3.08 Å. Both Pd(3)-Pd(3) bond lengths are 2.88 Å. There are two shorter (2.50 Å) and one longer (2.64 Å) Pd(3)-P(1) bond length. In the fourth Pd site, Pd(4) is bonded to four equivalent Gd(1), two equivalent Pd(3), four equivalent Pd(2), and two equivalent P(2) atoms to form distorted PdGd4P2Pd6 cuboctahedra that share faces with two equivalent Pd(4)Gd4P2Pd6 cuboctahedra and faces with four equivalent Pd(2)Gd4P3Pd5 cuboctahedra. Both Pd(4)-P(2) bond lengths are 2.44 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Gd(1), two equivalent Gd(2), one Pd(1), one Pd(2), and three equivalent Pd(3) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to one Gd(2), two equivalent Gd(1), one Pd(4), two equivalent Pd(2), and three equivalent Pd(1) atoms.