Nd2Ni12P7 crystallizes in the monoclinic Pm space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 18-coordinate geometry to one Ni(1), one Ni(2), one Ni(3), one Ni(4), one Ni(5), one Ni(6), two equivalent Ni(7), two equivalent Ni(8), two equivalent Ni(9), two equivalent P(4), two equivalent P(5), and two equivalent P(6) atoms. In the second Nd site, Nd(2) is bonded in a 15-coordinate geometry to one Ni(7), one Ni(8), one Ni(9), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), two equivalent P(1), two equivalent P(2), and two equivalent P(3) atoms. There are twelve inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 4-coordinate geometry to one Nd(1), two equivalent Nd(2), one P(1), one P(3), and two equivalent P(5) atoms. In the second Ni site, Ni(2) is bonded in a 4-coordinate geometry to one Nd(1), two equivalent Nd(2), one P(1), one P(2), and two equivalent P(6) atoms. In the third Ni site, Ni(3) is bonded in a 4-coordinate geometry to one Nd(1), two equivalent Nd(2), one P(2), one P(3), and two equivalent P(4) atoms. In the fourth Ni site, Ni(4) is bonded to one Nd(1), one P(1), one P(7), and two equivalent P(4) atoms to form distorted NiNdP4 tetrahedra that share corners with two equivalent Ni(9)Nd3P4 tetrahedra, corners with two equivalent Ni(4)NdP4 tetrahedra, corners with two equivalent Ni(5)NdP4 tetrahedra, corners with two equivalent Ni(6)NdP4 tetrahedra, edges with two equivalent Ni(8)Nd3P4 tetrahedra, and faces with two equivalent Ni(7)Nd3P4 tetrahedra. In the fifth Ni site, Ni(5) is bonded to one Nd(1), one P(2), one P(7), and two equivalent P(5) atoms to form distorted NiNdP4 tetrahedra that share corners with two equivalent Ni(7)Nd3P4 tetrahedra, corners with two equivalent Ni(4)NdP4 tetrahedra, corners with two equivalent Ni(5)NdP4 tetrahedra, corners with two equivalent Ni(6)NdP4 tetrahedra, edges with two equivalent Ni(9)Nd3P4 tetrahedra, and faces with two equivalent Ni(8)Nd3P4 tetrahedra. In the sixth Ni site, Ni(6) is bonded to one Nd(1), one P(3), one P(7), and two equivalent P(6) atoms to form distorted NiNdP4 tetrahedra that share corners with two equivalent Ni(8)Nd3P4 tetrahedra, corners with two equivalent Ni(4)NdP4 tetrahedra, corners with two equivalent Ni(5)NdP4 tetrahedra, corners with two equivalent Ni(6)NdP4 tetrahedra, edges with two equivalent Ni(7)Nd3P4 tetrahedra, and faces with two equivalent Ni(9)Nd3P4 tetrahedra. In the seventh Ni site, Ni(7) is bonded to one Nd(2), two equivalent Nd(1), one P(4), one P(6), and two equivalent P(1) atoms to form distorted NiNd3P4 tetrahedra that share corners with two equivalent Ni(5)NdP4 tetrahedra, corners with three equivalent Ni(8)Nd3P4 tetrahedra, corners with three equivalent Ni(9)Nd3P4 tetrahedra, edges with two equivalent Ni(7)Nd3P4 tetrahedra, edges with two equivalent Ni(6)NdP4 tetrahedra,  a faceface with one Ni(8)Nd3P4 tetrahedra,  a faceface with one Ni(9)Nd3P4 tetrahedra, and faces with two equivalent Ni(4)NdP4 tetrahedra. In the eighth Ni site, Ni(8) is bonded to one Nd(2), two equivalent Nd(1), one P(4), one P(5), and two equivalent P(2) atoms to form distorted NiNd3P4 tetrahedra that share corners with two equivalent Ni(6)NdP4 tetrahedra, corners with three equivalent Ni(7)Nd3P4 tetrahedra, corners with three equivalent Ni(9)Nd3P4 tetrahedra, edges with two equivalent Ni(8)Nd3P4 tetrahedra, edges with two equivalent Ni(4)NdP4 tetrahedra,  a faceface with one Ni(7)Nd3P4 tetrahedra,  a faceface with one Ni(9)Nd3P4 tetrahedra, and faces with two equivalent Ni(5)NdP4 tetrahedra. In the ninth Ni site, Ni(9) is bonded to one Nd(2), two equivalent Nd(1), one P(5), one P(6), and two equivalent P(3) atoms to form distorted NiNd3P4 tetrahedra that share corners with two equivalent Ni(4)NdP4 tetrahedra, corners with three equivalent Ni(7)Nd3P4 tetrahedra, corners with three equivalent Ni(8)Nd3P4 tetrahedra, edges with two equivalent Ni(9)Nd3P4 tetrahedra, edges with two equivalent Ni(5)NdP4 tetrahedra,  a faceface with one Ni(7)Nd3P4 tetrahedra,  a faceface with one Ni(8)Nd3P4 tetrahedra, and faces with two equivalent Ni(6)NdP4 tetrahedra. In the tenth Ni site, Ni(10) is bonded in a 5-coordinate geometry to one P(5), two equivalent P(1), and two equivalent P(7) atoms. In the eleventh Ni site, Ni(11) is bonded in a 5-coordinate geometry to one P(6), two equivalent P(2), and two equivalent P(7) atoms. In the twelfth Ni site, Ni(12) is bonded in a 5-coordinate geometry to one P(4), two equivalent P(3), and two equivalent P(7) atoms. There are seven inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), one Ni(1), one Ni(2), one Ni(4), two equivalent Ni(10), and two equivalent Ni(7) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Nd(2), one Ni(2), one Ni(3), one Ni(5), two equivalent Ni(11), and two equivalent Ni(8) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Nd(2), one Ni(1), one Ni(3), one Ni(6), two equivalent Ni(12), and two equivalent Ni(9) atoms. In the fourth P site, P(4) is bonded in a 9-coordinate geometry to two equivalent Nd(1), one Ni(12), one Ni(7), one Ni(8), two equivalent Ni(3), and two equivalent Ni(4) atoms. In the fifth P site, P(5) is bonded in a 9-coordinate geometry to two equivalent Nd(1), one Ni(10), one Ni(8), one Ni(9), two equivalent Ni(1), and two equivalent Ni(5) atoms. In the sixth P site, P(6) is bonded in a 9-coordinate geometry to two equivalent Nd(1), one Ni(11), one Ni(7), one Ni(9), two equivalent Ni(2), and two equivalent Ni(6) atoms. In the seventh P site, P(7) is bonded in a 9-coordinate geometry to one Ni(4), one Ni(5), one Ni(6), two equivalent Ni(10), two equivalent Ni(11), and two equivalent Ni(12) atoms.
Nd2Ni12P7 crystallizes in the monoclinic Pm space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 18-coordinate geometry to one Ni(1), one Ni(2), one Ni(3), one Ni(4), one Ni(5), one Ni(6), two equivalent Ni(7), two equivalent Ni(8), two equivalent Ni(9), two equivalent P(4), two equivalent P(5), and two equivalent P(6) atoms. The Nd(1)-Ni(1) bond length is 3.21 Å. The Nd(1)-Ni(2) bond length is 3.21 Å. The Nd(1)-Ni(3) bond length is 3.21 Å. The Nd(1)-Ni(4) bond length is 3.11 Å. The Nd(1)-Ni(5) bond length is 3.11 Å. The Nd(1)-Ni(6) bond length is 3.11 Å. Both Nd(1)-Ni(7) bond lengths are 3.05 Å. Both Nd(1)-Ni(8) bond lengths are 3.06 Å. Both Nd(1)-Ni(9) bond lengths are 3.05 Å. Both Nd(1)-P(4) bond lengths are 2.94 Å. Both Nd(1)-P(5) bond lengths are 2.94 Å. Both Nd(1)-P(6) bond lengths are 2.95 Å. In the second Nd site, Nd(2) is bonded in a 15-coordinate geometry to one Ni(7), one Ni(8), one Ni(9), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), two equivalent P(1), two equivalent P(2), and two equivalent P(3) atoms. The Nd(2)-Ni(7) bond length is 3.14 Å. The Nd(2)-Ni(8) bond length is 3.14 Å. The Nd(2)-Ni(9) bond length is 3.13 Å. Both Nd(2)-Ni(1) bond lengths are 2.98 Å. Both Nd(2)-Ni(2) bond lengths are 2.99 Å. Both Nd(2)-Ni(3) bond lengths are 2.99 Å. Both Nd(2)-P(1) bond lengths are 2.93 Å. Both Nd(2)-P(2) bond lengths are 2.92 Å. Both Nd(2)-P(3) bond lengths are 2.92 Å. There are twelve inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 4-coordinate geometry to one Nd(1), two equivalent Nd(2), one P(1), one P(3), and two equivalent P(5) atoms. The Ni(1)-P(1) bond length is 2.30 Å. The Ni(1)-P(3) bond length is 2.29 Å. Both Ni(1)-P(5) bond lengths are 2.31 Å. In the second Ni site, Ni(2) is bonded in a 4-coordinate geometry to one Nd(1), two equivalent Nd(2), one P(1), one P(2), and two equivalent P(6) atoms. The Ni(2)-P(1) bond length is 2.29 Å. The Ni(2)-P(2) bond length is 2.30 Å. Both Ni(2)-P(6) bond lengths are 2.32 Å. In the third Ni site, Ni(3) is bonded in a 4-coordinate geometry to one Nd(1), two equivalent Nd(2), one P(2), one P(3), and two equivalent P(4) atoms. The Ni(3)-P(2) bond length is 2.29 Å. The Ni(3)-P(3) bond length is 2.30 Å. Both Ni(3)-P(4) bond lengths are 2.32 Å. In the fourth Ni site, Ni(4) is bonded to one Nd(1), one P(1), one P(7), and two equivalent P(4) atoms to form distorted NiNdP4 tetrahedra that share corners with two equivalent Ni(9)Nd3P4 tetrahedra, corners with two equivalent Ni(4)NdP4 tetrahedra, corners with two equivalent Ni(5)NdP4 tetrahedra, corners with two equivalent Ni(6)NdP4 tetrahedra, edges with two equivalent Ni(8)Nd3P4 tetrahedra, and faces with two equivalent Ni(7)Nd3P4 tetrahedra. The Ni(4)-P(1) bond length is 2.22 Å. The Ni(4)-P(7) bond length is 2.15 Å. Both Ni(4)-P(4) bond lengths are 2.34 Å. In the fifth Ni site, Ni(5) is bonded to one Nd(1), one P(2), one P(7), and two equivalent P(5) atoms to form distorted NiNdP4 tetrahedra that share corners with two equivalent Ni(7)Nd3P4 tetrahedra, corners with two equivalent Ni(4)NdP4 tetrahedra, corners with two equivalent Ni(5)NdP4 tetrahedra, corners with two equivalent Ni(6)NdP4 tetrahedra, edges with two equivalent Ni(9)Nd3P4 tetrahedra, and faces with two equivalent Ni(8)Nd3P4 tetrahedra. The Ni(5)-P(2) bond length is 2.22 Å. The Ni(5)-P(7) bond length is 2.15 Å. Both Ni(5)-P(5) bond lengths are 2.34 Å. In the sixth Ni site, Ni(6) is bonded to one Nd(1), one P(3), one P(7), and two equivalent P(6) atoms to form distorted NiNdP4 tetrahedra that share corners with two equivalent Ni(8)Nd3P4 tetrahedra, corners with two equivalent Ni(4)NdP4 tetrahedra, corners with two equivalent Ni(5)NdP4 tetrahedra, corners with two equivalent Ni(6)NdP4 tetrahedra, edges with two equivalent Ni(7)Nd3P4 tetrahedra, and faces with two equivalent Ni(9)Nd3P4 tetrahedra. The Ni(6)-P(3) bond length is 2.22 Å. The Ni(6)-P(7) bond length is 2.15 Å. Both Ni(6)-P(6) bond lengths are 2.34 Å. In the seventh Ni site, Ni(7) is bonded to one Nd(2), two equivalent Nd(1), one P(4), one P(6), and two equivalent P(1) atoms to form distorted NiNd3P4 tetrahedra that share corners with two equivalent Ni(5)NdP4 tetrahedra, corners with three equivalent Ni(8)Nd3P4 tetrahedra, corners with three equivalent Ni(9)Nd3P4 tetrahedra, edges with two equivalent Ni(7)Nd3P4 tetrahedra, edges with two equivalent Ni(6)NdP4 tetrahedra,  a faceface with one Ni(8)Nd3P4 tetrahedra,  a faceface with one Ni(9)Nd3P4 tetrahedra, and faces with two equivalent Ni(4)NdP4 tetrahedra. The Ni(7)-P(4) bond length is 2.40 Å. The Ni(7)-P(6) bond length is 2.31 Å. Both Ni(7)-P(1) bond lengths are 2.29 Å. In the eighth Ni site, Ni(8) is bonded to one Nd(2), two equivalent Nd(1), one P(4), one P(5), and two equivalent P(2) atoms to form distorted NiNd3P4 tetrahedra that share corners with two equivalent Ni(6)NdP4 tetrahedra, corners with three equivalent Ni(7)Nd3P4 tetrahedra, corners with three equivalent Ni(9)Nd3P4 tetrahedra, edges with two equivalent Ni(8)Nd3P4 tetrahedra, edges with two equivalent Ni(4)NdP4 tetrahedra,  a faceface with one Ni(7)Nd3P4 tetrahedra,  a faceface with one Ni(9)Nd3P4 tetrahedra, and faces with two equivalent Ni(5)NdP4 tetrahedra. The Ni(8)-P(4) bond length is 2.31 Å. The Ni(8)-P(5) bond length is 2.39 Å. Both Ni(8)-P(2) bond lengths are 2.29 Å. In the ninth Ni site, Ni(9) is bonded to one Nd(2), two equivalent Nd(1), one P(5), one P(6), and two equivalent P(3) atoms to form distorted NiNd3P4 tetrahedra that share corners with two equivalent Ni(4)NdP4 tetrahedra, corners with three equivalent Ni(7)Nd3P4 tetrahedra, corners with three equivalent Ni(8)Nd3P4 tetrahedra, edges with two equivalent Ni(9)Nd3P4 tetrahedra, edges with two equivalent Ni(5)NdP4 tetrahedra,  a faceface with one Ni(7)Nd3P4 tetrahedra,  a faceface with one Ni(8)Nd3P4 tetrahedra, and faces with two equivalent Ni(6)NdP4 tetrahedra. The Ni(9)-P(5) bond length is 2.31 Å. The Ni(9)-P(6) bond length is 2.39 Å. Both Ni(9)-P(3) bond lengths are 2.29 Å. In the tenth Ni site, Ni(10) is bonded in a 5-coordinate geometry to one P(5), two equivalent P(1), and two equivalent P(7) atoms. The Ni(10)-P(5) bond length is 2.28 Å. Both Ni(10)-P(1) bond lengths are 2.57 Å. Both Ni(10)-P(7) bond lengths are 2.52 Å. In the eleventh Ni site, Ni(11) is bonded in a 5-coordinate geometry to one P(6), two equivalent P(2), and two equivalent P(7) atoms. The Ni(11)-P(6) bond length is 2.28 Å. Both Ni(11)-P(2) bond lengths are 2.57 Å. Both Ni(11)-P(7) bond lengths are 2.51 Å. In the twelfth Ni site, Ni(12) is bonded in a 5-coordinate geometry to one P(4), two equivalent P(3), and two equivalent P(7) atoms. The Ni(12)-P(4) bond length is 2.28 Å. Both Ni(12)-P(3) bond lengths are 2.57 Å. Both Ni(12)-P(7) bond lengths are 2.51 Å. There are seven inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), one Ni(1), one Ni(2), one Ni(4), two equivalent Ni(10), and two equivalent Ni(7) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Nd(2), one Ni(2), one Ni(3), one Ni(5), two equivalent Ni(11), and two equivalent Ni(8) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Nd(2), one Ni(1), one Ni(3), one Ni(6), two equivalent Ni(12), and two equivalent Ni(9) atoms. In the fourth P site, P(4) is bonded in a 9-coordinate geometry to two equivalent Nd(1), one Ni(12), one Ni(7), one Ni(8), two equivalent Ni(3), and two equivalent Ni(4) atoms. In the fifth P site, P(5) is bonded in a 9-coordinate geometry to two equivalent Nd(1), one Ni(10), one Ni(8), one Ni(9), two equivalent Ni(1), and two equivalent Ni(5) atoms. In the sixth P site, P(6) is bonded in a 9-coordinate geometry to two equivalent Nd(1), one Ni(11), one Ni(7), one Ni(9), two equivalent Ni(2), and two equivalent Ni(6) atoms. In the seventh P site, P(7) is bonded in a 9-coordinate geometry to one Ni(4), one Ni(5), one Ni(6), two equivalent Ni(10), two equivalent Ni(11), and two equivalent Ni(12) atoms.