Sm2Mn3Cu9P7 crystallizes in the monoclinic Pm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 18-coordinate geometry to one Cu(1), one Cu(2), one Cu(3), one Cu(4), one Cu(5), one Cu(6), two equivalent Cu(7), two equivalent Cu(8), two equivalent Cu(9), two equivalent P(4), two equivalent P(5), and two equivalent P(6) atoms. In the second Sm site, Sm(2) is bonded in a 15-coordinate geometry to one Cu(7), one Cu(8), one Cu(9), two equivalent Cu(1), two equivalent Cu(2), two equivalent Cu(3), two equivalent P(1), two equivalent P(2), and two equivalent P(3) atoms. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 5-coordinate geometry to one Cu(7), one P(5), two equivalent P(1), and two equivalent P(7) atoms. In the second Mn site, Mn(2) is bonded in a 5-coordinate geometry to one Cu(8), one P(6), two equivalent P(2), and two equivalent P(7) atoms. In the third Mn site, Mn(3) is bonded in a 5-coordinate geometry to one P(4), two equivalent P(3), and two equivalent P(7) atoms. There are nine inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one Sm(1), two equivalent Sm(2), one P(1), one P(3), and two equivalent P(5) atoms to form distorted CuSm3P4 tetrahedra that share corners with three equivalent Cu(3)Sm3Cu2P4 tetrahedra, edges with two equivalent Cu(1)Sm3P4 tetrahedra, and  a faceface with one Cu(3)Sm3Cu2P4 tetrahedra. In the second Cu site, Cu(2) is bonded in a 4-coordinate geometry to one Sm(1), two equivalent Sm(2), two equivalent Cu(7), one P(1), one P(2), and two equivalent P(6) atoms. In the third Cu site, Cu(3) is bonded to one Sm(1), two equivalent Sm(2), two equivalent Cu(8), one P(2), one P(3), and two equivalent P(4) atoms to form distorted CuSm3Cu2P4 tetrahedra that share corners with three equivalent Cu(1)Sm3P4 tetrahedra,  a faceface with one Cu(1)Sm3P4 tetrahedra, and faces with two equivalent Cu(3)Sm3Cu2P4 tetrahedra. In the fourth Cu site, Cu(4) is bonded in a 4-coordinate geometry to one Sm(1), two equivalent Cu(7), one P(1), one P(7), and two equivalent P(4) atoms. In the fifth Cu site, Cu(5) is bonded in a 4-coordinate geometry to one Sm(1), two equivalent Cu(8), one P(2), one P(7), and two equivalent P(5) atoms. In the sixth Cu site, Cu(6) is bonded in a 4-coordinate geometry to one Sm(1), one P(3), one P(7), and two equivalent P(6) atoms. In the seventh Cu site, Cu(7) is bonded in a 12-coordinate geometry to one Sm(2), two equivalent Sm(1), one Mn(1), two equivalent Cu(2), two equivalent Cu(4), one P(4), one P(6), and two equivalent P(1) atoms. In the eighth Cu site, Cu(8) is bonded in a 12-coordinate geometry to one Sm(2), two equivalent Sm(1), one Mn(2), two equivalent Cu(3), two equivalent Cu(5), one P(4), one P(5), and two equivalent P(2) atoms. In the ninth Cu site, Cu(9) is bonded in a 4-coordinate geometry to one Sm(2), two equivalent Sm(1), one P(5), one P(6), and two equivalent P(3) atoms. There are seven inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Sm(2), two equivalent Mn(1), one Cu(1), one Cu(2), one Cu(4), and two equivalent Cu(7) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Sm(2), two equivalent Mn(2), one Cu(2), one Cu(3), one Cu(5), and two equivalent Cu(8) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Sm(2), two equivalent Mn(3), one Cu(1), one Cu(3), one Cu(6), and two equivalent Cu(9) atoms. In the fourth P site, P(4) is bonded in a 9-coordinate geometry to two equivalent Sm(1), one Mn(3), one Cu(7), one Cu(8), two equivalent Cu(3), and two equivalent Cu(4) atoms. In the fifth P site, P(5) is bonded in a 9-coordinate geometry to two equivalent Sm(1), one Mn(1), one Cu(8), one Cu(9), two equivalent Cu(1), and two equivalent Cu(5) atoms. In the sixth P site, P(6) is bonded in a 9-coordinate geometry to two equivalent Sm(1), one Mn(2), one Cu(7), one Cu(9), two equivalent Cu(2), and two equivalent Cu(6) atoms. In the seventh P site, P(7) is bonded in a 9-coordinate geometry to two equivalent Mn(1), two equivalent Mn(2), two equivalent Mn(3), one Cu(4), one Cu(5), and one Cu(6) atom.
Sm2Mn3Cu9P7 crystallizes in the monoclinic Pm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 18-coordinate geometry to one Cu(1), one Cu(2), one Cu(3), one Cu(4), one Cu(5), one Cu(6), two equivalent Cu(7), two equivalent Cu(8), two equivalent Cu(9), two equivalent P(4), two equivalent P(5), and two equivalent P(6) atoms. The Sm(1)-Cu(1) bond length is 3.21 Å. The Sm(1)-Cu(2) bond length is 3.25 Å. The Sm(1)-Cu(3) bond length is 3.23 Å. The Sm(1)-Cu(4) bond length is 3.17 Å. The Sm(1)-Cu(5) bond length is 3.16 Å. The Sm(1)-Cu(6) bond length is 3.18 Å. Both Sm(1)-Cu(7) bond lengths are 3.16 Å. Both Sm(1)-Cu(8) bond lengths are 3.18 Å. Both Sm(1)-Cu(9) bond lengths are 3.10 Å. Both Sm(1)-P(4) bond lengths are 2.92 Å. Both Sm(1)-P(5) bond lengths are 2.96 Å. Both Sm(1)-P(6) bond lengths are 2.98 Å. In the second Sm site, Sm(2) is bonded in a 15-coordinate geometry to one Cu(7), one Cu(8), one Cu(9), two equivalent Cu(1), two equivalent Cu(2), two equivalent Cu(3), two equivalent P(1), two equivalent P(2), and two equivalent P(3) atoms. The Sm(2)-Cu(7) bond length is 3.17 Å. The Sm(2)-Cu(8) bond length is 3.16 Å. The Sm(2)-Cu(9) bond length is 3.18 Å. Both Sm(2)-Cu(1) bond lengths are 3.09 Å. Both Sm(2)-Cu(2) bond lengths are 3.09 Å. Both Sm(2)-Cu(3) bond lengths are 3.14 Å. Both Sm(2)-P(1) bond lengths are 2.94 Å. Both Sm(2)-P(2) bond lengths are 2.92 Å. Both Sm(2)-P(3) bond lengths are 2.93 Å. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 5-coordinate geometry to one Cu(7), one P(5), two equivalent P(1), and two equivalent P(7) atoms. The Mn(1)-Cu(7) bond length is 2.76 Å. The Mn(1)-P(5) bond length is 2.32 Å. Both Mn(1)-P(1) bond lengths are 2.57 Å. Both Mn(1)-P(7) bond lengths are 2.55 Å. In the second Mn site, Mn(2) is bonded in a 5-coordinate geometry to one Cu(8), one P(6), two equivalent P(2), and two equivalent P(7) atoms. The Mn(2)-Cu(8) bond length is 2.78 Å. The Mn(2)-P(6) bond length is 2.36 Å. Both Mn(2)-P(2) bond lengths are 2.59 Å. Both Mn(2)-P(7) bond lengths are 2.49 Å. In the third Mn site, Mn(3) is bonded in a 5-coordinate geometry to one P(4), two equivalent P(3), and two equivalent P(7) atoms. The Mn(3)-P(4) bond length is 2.40 Å. Both Mn(3)-P(3) bond lengths are 2.68 Å. Both Mn(3)-P(7) bond lengths are 2.60 Å. There are nine inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one Sm(1), two equivalent Sm(2), one P(1), one P(3), and two equivalent P(5) atoms to form distorted CuSm3P4 tetrahedra that share corners with three equivalent Cu(3)Sm3Cu2P4 tetrahedra, edges with two equivalent Cu(1)Sm3P4 tetrahedra, and  a faceface with one Cu(3)Sm3Cu2P4 tetrahedra. The Cu(1)-P(1) bond length is 2.28 Å. The Cu(1)-P(3) bond length is 2.40 Å. Both Cu(1)-P(5) bond lengths are 2.36 Å. In the second Cu site, Cu(2) is bonded in a 4-coordinate geometry to one Sm(1), two equivalent Sm(2), two equivalent Cu(7), one P(1), one P(2), and two equivalent P(6) atoms. Both Cu(2)-Cu(7) bond lengths are 2.68 Å. The Cu(2)-P(1) bond length is 2.46 Å. The Cu(2)-P(2) bond length is 2.29 Å. Both Cu(2)-P(6) bond lengths are 2.36 Å. In the third Cu site, Cu(3) is bonded to one Sm(1), two equivalent Sm(2), two equivalent Cu(8), one P(2), one P(3), and two equivalent P(4) atoms to form distorted CuSm3Cu2P4 tetrahedra that share corners with three equivalent Cu(1)Sm3P4 tetrahedra,  a faceface with one Cu(1)Sm3P4 tetrahedra, and faces with two equivalent Cu(3)Sm3Cu2P4 tetrahedra. Both Cu(3)-Cu(8) bond lengths are 2.66 Å. The Cu(3)-P(2) bond length is 2.48 Å. The Cu(3)-P(3) bond length is 2.32 Å. Both Cu(3)-P(4) bond lengths are 2.39 Å. In the fourth Cu site, Cu(4) is bonded in a 4-coordinate geometry to one Sm(1), two equivalent Cu(7), one P(1), one P(7), and two equivalent P(4) atoms. Both Cu(4)-Cu(7) bond lengths are 2.65 Å. The Cu(4)-P(1) bond length is 2.28 Å. The Cu(4)-P(7) bond length is 2.29 Å. Both Cu(4)-P(4) bond lengths are 2.40 Å. In the fifth Cu site, Cu(5) is bonded in a 4-coordinate geometry to one Sm(1), two equivalent Cu(8), one P(2), one P(7), and two equivalent P(5) atoms. Both Cu(5)-Cu(8) bond lengths are 2.63 Å. The Cu(5)-P(2) bond length is 2.28 Å. The Cu(5)-P(7) bond length is 2.23 Å. Both Cu(5)-P(5) bond lengths are 2.36 Å. In the sixth Cu site, Cu(6) is bonded in a 4-coordinate geometry to one Sm(1), one P(3), one P(7), and two equivalent P(6) atoms. The Cu(6)-P(3) bond length is 2.32 Å. The Cu(6)-P(7) bond length is 2.28 Å. Both Cu(6)-P(6) bond lengths are 2.36 Å. In the seventh Cu site, Cu(7) is bonded in a 12-coordinate geometry to one Sm(2), two equivalent Sm(1), one Mn(1), two equivalent Cu(2), two equivalent Cu(4), one P(4), one P(6), and two equivalent P(1) atoms. The Cu(7)-P(4) bond length is 2.45 Å. The Cu(7)-P(6) bond length is 2.38 Å. Both Cu(7)-P(1) bond lengths are 2.40 Å. In the eighth Cu site, Cu(8) is bonded in a 12-coordinate geometry to one Sm(2), two equivalent Sm(1), one Mn(2), two equivalent Cu(3), two equivalent Cu(5), one P(4), one P(5), and two equivalent P(2) atoms. The Cu(8)-P(4) bond length is 2.38 Å. The Cu(8)-P(5) bond length is 2.43 Å. Both Cu(8)-P(2) bond lengths are 2.41 Å. In the ninth Cu site, Cu(9) is bonded in a 4-coordinate geometry to one Sm(2), two equivalent Sm(1), one P(5), one P(6), and two equivalent P(3) atoms. The Cu(9)-P(5) bond length is 2.39 Å. The Cu(9)-P(6) bond length is 2.45 Å. Both Cu(9)-P(3) bond lengths are 2.37 Å. There are seven inequivalent P sites. In the first P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Sm(2), two equivalent Mn(1), one Cu(1), one Cu(2), one Cu(4), and two equivalent Cu(7) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Sm(2), two equivalent Mn(2), one Cu(2), one Cu(3), one Cu(5), and two equivalent Cu(8) atoms. In the third P site, P(3) is bonded in a 9-coordinate geometry to two equivalent Sm(2), two equivalent Mn(3), one Cu(1), one Cu(3), one Cu(6), and two equivalent Cu(9) atoms. In the fourth P site, P(4) is bonded in a 9-coordinate geometry to two equivalent Sm(1), one Mn(3), one Cu(7), one Cu(8), two equivalent Cu(3), and two equivalent Cu(4) atoms. In the fifth P site, P(5) is bonded in a 9-coordinate geometry to two equivalent Sm(1), one Mn(1), one Cu(8), one Cu(9), two equivalent Cu(1), and two equivalent Cu(5) atoms. In the sixth P site, P(6) is bonded in a 9-coordinate geometry to two equivalent Sm(1), one Mn(2), one Cu(7), one Cu(9), two equivalent Cu(2), and two equivalent Cu(6) atoms. In the seventh P site, P(7) is bonded in a 9-coordinate geometry to two equivalent Mn(1), two equivalent Mn(2), two equivalent Mn(3), one Cu(4), one Cu(5), and one Cu(6) atom.