Fe2Pt4NiCu is Tetraauricupride-derived structured and crystallizes in the tetragonal P4mm space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to four equivalent Fe(1), four equivalent Pt(2), and four equivalent Pt(3) atoms to form distorted FeFe4Pt8 cuboctahedra that share corners with four equivalent Fe(1)Fe4Pt8 cuboctahedra, corners with four equivalent Fe(2)Fe4Pt8 cuboctahedra, corners with four equivalent Ni(1)Ni4Pt8 cuboctahedra, edges with four equivalent Fe(2)Fe4Pt8 cuboctahedra, edges with four equivalent Ni(1)Ni4Pt8 cuboctahedra, edges with eight equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, edges with eight equivalent Pt(3)Fe8Pt4 cuboctahedra,  a faceface with one Fe(2)Fe4Pt8 cuboctahedra,  a faceface with one Ni(1)Ni4Pt8 cuboctahedra, faces with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, faces with four equivalent Pt(3)Fe8Pt4 cuboctahedra, and faces with eight equivalent Fe(1)Fe4Pt8 cuboctahedra. In the second Fe site, Fe(2) is bonded to four equivalent Fe(2), four equivalent Pt(3), and four equivalent Pt(4) atoms to form distorted FeFe4Pt8 cuboctahedra that share corners with four equivalent Fe(1)Fe4Pt8 cuboctahedra, corners with four equivalent Fe(2)Fe4Pt8 cuboctahedra, corners with four equivalent Cu(1)Cu4Pt8 cuboctahedra, edges with four equivalent Fe(1)Fe4Pt8 cuboctahedra, edges with four equivalent Cu(1)Cu4Pt8 cuboctahedra, edges with eight equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, edges with eight equivalent Pt(3)Fe8Pt4 cuboctahedra,  a faceface with one Fe(1)Fe4Pt8 cuboctahedra,  a faceface with one Cu(1)Cu4Pt8 cuboctahedra, faces with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, faces with four equivalent Pt(3)Fe8Pt4 cuboctahedra, and faces with eight equivalent Fe(2)Fe4Pt8 cuboctahedra. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to four equivalent Pt(1), four equivalent Ni(1), and four equivalent Cu(1) atoms to form distorted PtCu4Ni4Pt4 cuboctahedra that share corners with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, corners with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, corners with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, edges with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, edges with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, edges with eight equivalent Ni(1)Ni4Pt8 cuboctahedra, edges with eight equivalent Cu(1)Cu4Pt8 cuboctahedra,  a faceface with one Pt(4)Fe4Cu4Pt4 cuboctahedra,  a faceface with one Pt(2)Fe4Ni4Pt4 cuboctahedra, faces with four equivalent Ni(1)Ni4Pt8 cuboctahedra, faces with four equivalent Cu(1)Cu4Pt8 cuboctahedra, and faces with eight equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra. In the second Pt site, Pt(2) is bonded to four equivalent Fe(1), four equivalent Pt(2), and four equivalent Ni(1) atoms to form distorted PtFe4Ni4Pt4 cuboctahedra that share corners with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, corners with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, corners with four equivalent Pt(3)Fe8Pt4 cuboctahedra, edges with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, edges with four equivalent Pt(3)Fe8Pt4 cuboctahedra, edges with eight equivalent Fe(1)Fe4Pt8 cuboctahedra, edges with eight equivalent Ni(1)Ni4Pt8 cuboctahedra,  a faceface with one Pt(1)Cu4Ni4Pt4 cuboctahedra,  a faceface with one Pt(3)Fe8Pt4 cuboctahedra, faces with four equivalent Fe(1)Fe4Pt8 cuboctahedra, faces with four equivalent Ni(1)Ni4Pt8 cuboctahedra, and faces with eight equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra. In the third Pt site, Pt(3) is bonded to four equivalent Fe(1), four equivalent Fe(2), and four equivalent Pt(3) atoms to form distorted PtFe8Pt4 cuboctahedra that share corners with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, corners with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, corners with four equivalent Pt(3)Fe8Pt4 cuboctahedra, edges with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, edges with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, edges with eight equivalent Fe(1)Fe4Pt8 cuboctahedra, edges with eight equivalent Fe(2)Fe4Pt8 cuboctahedra,  a faceface with one Pt(4)Fe4Cu4Pt4 cuboctahedra,  a faceface with one Pt(2)Fe4Ni4Pt4 cuboctahedra, faces with four equivalent Fe(1)Fe4Pt8 cuboctahedra, faces with four equivalent Fe(2)Fe4Pt8 cuboctahedra, and faces with eight equivalent Pt(3)Fe8Pt4 cuboctahedra. In the fourth Pt site, Pt(4) is bonded to four equivalent Fe(2), four equivalent Pt(4), and four equivalent Cu(1) atoms to form distorted PtFe4Cu4Pt4 cuboctahedra that share corners with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, corners with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, corners with four equivalent Pt(3)Fe8Pt4 cuboctahedra, edges with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, edges with four equivalent Pt(3)Fe8Pt4 cuboctahedra, edges with eight equivalent Fe(2)Fe4Pt8 cuboctahedra, edges with eight equivalent Cu(1)Cu4Pt8 cuboctahedra,  a faceface with one Pt(1)Cu4Ni4Pt4 cuboctahedra,  a faceface with one Pt(3)Fe8Pt4 cuboctahedra, faces with four equivalent Fe(2)Fe4Pt8 cuboctahedra, faces with four equivalent Cu(1)Cu4Pt8 cuboctahedra, and faces with eight equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra. Ni(1) is bonded to four equivalent Pt(1), four equivalent Pt(2), and four equivalent Ni(1) atoms to form distorted NiNi4Pt8 cuboctahedra that share corners with four equivalent Fe(1)Fe4Pt8 cuboctahedra, corners with four equivalent Ni(1)Ni4Pt8 cuboctahedra, corners with four equivalent Cu(1)Cu4Pt8 cuboctahedra, edges with four equivalent Fe(1)Fe4Pt8 cuboctahedra, edges with four equivalent Cu(1)Cu4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, edges with eight equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra,  a faceface with one Fe(1)Fe4Pt8 cuboctahedra,  a faceface with one Cu(1)Cu4Pt8 cuboctahedra, faces with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, faces with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, and faces with eight equivalent Ni(1)Ni4Pt8 cuboctahedra. Cu(1) is bonded to four equivalent Pt(1), four equivalent Pt(4), and four equivalent Cu(1) atoms to form distorted CuCu4Pt8 cuboctahedra that share corners with four equivalent Fe(2)Fe4Pt8 cuboctahedra, corners with four equivalent Ni(1)Ni4Pt8 cuboctahedra, corners with four equivalent Cu(1)Cu4Pt8 cuboctahedra, edges with four equivalent Fe(2)Fe4Pt8 cuboctahedra, edges with four equivalent Ni(1)Ni4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, edges with eight equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra,  a faceface with one Fe(2)Fe4Pt8 cuboctahedra,  a faceface with one Ni(1)Ni4Pt8 cuboctahedra, faces with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, faces with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, and faces with eight equivalent Cu(1)Cu4Pt8 cuboctahedra.
Fe2Pt4NiCu is Tetraauricupride-derived structured and crystallizes in the tetragonal P4mm space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to four equivalent Fe(1), four equivalent Pt(2), and four equivalent Pt(3) atoms to form distorted FeFe4Pt8 cuboctahedra that share corners with four equivalent Fe(1)Fe4Pt8 cuboctahedra, corners with four equivalent Fe(2)Fe4Pt8 cuboctahedra, corners with four equivalent Ni(1)Ni4Pt8 cuboctahedra, edges with four equivalent Fe(2)Fe4Pt8 cuboctahedra, edges with four equivalent Ni(1)Ni4Pt8 cuboctahedra, edges with eight equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, edges with eight equivalent Pt(3)Fe8Pt4 cuboctahedra,  a faceface with one Fe(2)Fe4Pt8 cuboctahedra,  a faceface with one Ni(1)Ni4Pt8 cuboctahedra, faces with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, faces with four equivalent Pt(3)Fe8Pt4 cuboctahedra, and faces with eight equivalent Fe(1)Fe4Pt8 cuboctahedra. All Fe(1)-Fe(1) bond lengths are 2.72 Å. All Fe(1)-Pt(2) bond lengths are 2.68 Å. All Fe(1)-Pt(3) bond lengths are 2.68 Å. In the second Fe site, Fe(2) is bonded to four equivalent Fe(2), four equivalent Pt(3), and four equivalent Pt(4) atoms to form distorted FeFe4Pt8 cuboctahedra that share corners with four equivalent Fe(1)Fe4Pt8 cuboctahedra, corners with four equivalent Fe(2)Fe4Pt8 cuboctahedra, corners with four equivalent Cu(1)Cu4Pt8 cuboctahedra, edges with four equivalent Fe(1)Fe4Pt8 cuboctahedra, edges with four equivalent Cu(1)Cu4Pt8 cuboctahedra, edges with eight equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, edges with eight equivalent Pt(3)Fe8Pt4 cuboctahedra,  a faceface with one Fe(1)Fe4Pt8 cuboctahedra,  a faceface with one Cu(1)Cu4Pt8 cuboctahedra, faces with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, faces with four equivalent Pt(3)Fe8Pt4 cuboctahedra, and faces with eight equivalent Fe(2)Fe4Pt8 cuboctahedra. All Fe(2)-Fe(2) bond lengths are 2.72 Å. All Fe(2)-Pt(3) bond lengths are 2.69 Å. All Fe(2)-Pt(4) bond lengths are 2.66 Å. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to four equivalent Pt(1), four equivalent Ni(1), and four equivalent Cu(1) atoms to form distorted PtCu4Ni4Pt4 cuboctahedra that share corners with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, corners with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, corners with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, edges with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, edges with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, edges with eight equivalent Ni(1)Ni4Pt8 cuboctahedra, edges with eight equivalent Cu(1)Cu4Pt8 cuboctahedra,  a faceface with one Pt(4)Fe4Cu4Pt4 cuboctahedra,  a faceface with one Pt(2)Fe4Ni4Pt4 cuboctahedra, faces with four equivalent Ni(1)Ni4Pt8 cuboctahedra, faces with four equivalent Cu(1)Cu4Pt8 cuboctahedra, and faces with eight equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra. All Pt(1)-Pt(1) bond lengths are 2.72 Å. All Pt(1)-Ni(1) bond lengths are 2.63 Å. All Pt(1)-Cu(1) bond lengths are 2.69 Å. In the second Pt site, Pt(2) is bonded to four equivalent Fe(1), four equivalent Pt(2), and four equivalent Ni(1) atoms to form distorted PtFe4Ni4Pt4 cuboctahedra that share corners with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, corners with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, corners with four equivalent Pt(3)Fe8Pt4 cuboctahedra, edges with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, edges with four equivalent Pt(3)Fe8Pt4 cuboctahedra, edges with eight equivalent Fe(1)Fe4Pt8 cuboctahedra, edges with eight equivalent Ni(1)Ni4Pt8 cuboctahedra,  a faceface with one Pt(1)Cu4Ni4Pt4 cuboctahedra,  a faceface with one Pt(3)Fe8Pt4 cuboctahedra, faces with four equivalent Fe(1)Fe4Pt8 cuboctahedra, faces with four equivalent Ni(1)Ni4Pt8 cuboctahedra, and faces with eight equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra. All Pt(2)-Pt(2) bond lengths are 2.72 Å. All Pt(2)-Ni(1) bond lengths are 2.68 Å. In the third Pt site, Pt(3) is bonded to four equivalent Fe(1), four equivalent Fe(2), and four equivalent Pt(3) atoms to form distorted PtFe8Pt4 cuboctahedra that share corners with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, corners with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, corners with four equivalent Pt(3)Fe8Pt4 cuboctahedra, edges with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, edges with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, edges with eight equivalent Fe(1)Fe4Pt8 cuboctahedra, edges with eight equivalent Fe(2)Fe4Pt8 cuboctahedra,  a faceface with one Pt(4)Fe4Cu4Pt4 cuboctahedra,  a faceface with one Pt(2)Fe4Ni4Pt4 cuboctahedra, faces with four equivalent Fe(1)Fe4Pt8 cuboctahedra, faces with four equivalent Fe(2)Fe4Pt8 cuboctahedra, and faces with eight equivalent Pt(3)Fe8Pt4 cuboctahedra. All Pt(3)-Pt(3) bond lengths are 2.72 Å. In the fourth Pt site, Pt(4) is bonded to four equivalent Fe(2), four equivalent Pt(4), and four equivalent Cu(1) atoms to form distorted PtFe4Cu4Pt4 cuboctahedra that share corners with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, corners with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, corners with four equivalent Pt(3)Fe8Pt4 cuboctahedra, edges with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, edges with four equivalent Pt(3)Fe8Pt4 cuboctahedra, edges with eight equivalent Fe(2)Fe4Pt8 cuboctahedra, edges with eight equivalent Cu(1)Cu4Pt8 cuboctahedra,  a faceface with one Pt(1)Cu4Ni4Pt4 cuboctahedra,  a faceface with one Pt(3)Fe8Pt4 cuboctahedra, faces with four equivalent Fe(2)Fe4Pt8 cuboctahedra, faces with four equivalent Cu(1)Cu4Pt8 cuboctahedra, and faces with eight equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra. All Pt(4)-Pt(4) bond lengths are 2.72 Å. All Pt(4)-Cu(1) bond lengths are 2.70 Å. Ni(1) is bonded to four equivalent Pt(1), four equivalent Pt(2), and four equivalent Ni(1) atoms to form distorted NiNi4Pt8 cuboctahedra that share corners with four equivalent Fe(1)Fe4Pt8 cuboctahedra, corners with four equivalent Ni(1)Ni4Pt8 cuboctahedra, corners with four equivalent Cu(1)Cu4Pt8 cuboctahedra, edges with four equivalent Fe(1)Fe4Pt8 cuboctahedra, edges with four equivalent Cu(1)Cu4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, edges with eight equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra,  a faceface with one Fe(1)Fe4Pt8 cuboctahedra,  a faceface with one Cu(1)Cu4Pt8 cuboctahedra, faces with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, faces with four equivalent Pt(2)Fe4Ni4Pt4 cuboctahedra, and faces with eight equivalent Ni(1)Ni4Pt8 cuboctahedra. All Ni(1)-Ni(1) bond lengths are 2.72 Å. Cu(1) is bonded to four equivalent Pt(1), four equivalent Pt(4), and four equivalent Cu(1) atoms to form distorted CuCu4Pt8 cuboctahedra that share corners with four equivalent Fe(2)Fe4Pt8 cuboctahedra, corners with four equivalent Ni(1)Ni4Pt8 cuboctahedra, corners with four equivalent Cu(1)Cu4Pt8 cuboctahedra, edges with four equivalent Fe(2)Fe4Pt8 cuboctahedra, edges with four equivalent Ni(1)Ni4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, edges with eight equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra,  a faceface with one Fe(2)Fe4Pt8 cuboctahedra,  a faceface with one Ni(1)Ni4Pt8 cuboctahedra, faces with four equivalent Pt(1)Cu4Ni4Pt4 cuboctahedra, faces with four equivalent Pt(4)Fe4Cu4Pt4 cuboctahedra, and faces with eight equivalent Cu(1)Cu4Pt8 cuboctahedra. All Cu(1)-Cu(1) bond lengths are 2.72 Å.