Y3Pb3N5 crystallizes in the triclinic P-1 space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded to one N(1), one N(5), and two equivalent N(3) atoms to form distorted edge-sharing YN4 trigonal pyramids. In the second Y site, Y(2) is bonded in a 4-coordinate geometry to one N(1), one N(2), and two equivalent N(4) atoms. In the third Y site, Y(3) is bonded in a 5-coordinate geometry to one N(1), one N(2), one N(3), one N(4), and one N(5) atom. There are three inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to one N(1) and two equivalent N(2) atoms. In the second Pb site, Pb(2) is bonded in a distorted T-shaped geometry to one N(3) and two equivalent N(5) atoms. In the third Pb site, Pb(3) is bonded in a 3-coordinate geometry to one N(1), one N(3), and one N(4) atom. There are five inequivalent N sites. In the first N site, N(1) is bonded to one Y(1), one Y(2), one Y(3), one Pb(1), and one Pb(3) atom to form distorted NY3Pb2 trigonal bipyramids that share  a cornercorner with one N(3)Y3Pb2 trigonal bipyramid, corners with two equivalent N(4)Y3Pb trigonal pyramids,  an edgeedge with one N(4)Y3Pb trigonal pyramid, and  a faceface with one N(3)Y3Pb2 trigonal bipyramid. In the second N site, N(2) is bonded in a distorted see-saw-like geometry to one Y(2), one Y(3), and two equivalent Pb(1) atoms. In the third N site, N(3) is bonded to one Y(3), two equivalent Y(1), one Pb(2), and one Pb(3) atom to form distorted NY3Pb2 trigonal bipyramids that share  a cornercorner with one N(1)Y3Pb2 trigonal bipyramid,  an edgeedge with one N(3)Y3Pb2 trigonal bipyramid,  an edgeedge with one N(4)Y3Pb trigonal pyramid, and  a faceface with one N(1)Y3Pb2 trigonal bipyramid. In the fourth N site, N(4) is bonded to one Y(3), two equivalent Y(2), and one Pb(3) atom to form distorted NY3Pb trigonal pyramids that share corners with two equivalent N(1)Y3Pb2 trigonal bipyramids,  an edgeedge with one N(1)Y3Pb2 trigonal bipyramid,  an edgeedge with one N(3)Y3Pb2 trigonal bipyramid, and  an edgeedge with one N(4)Y3Pb trigonal pyramid. In the fifth N site, N(5) is bonded in a distorted rectangular see-saw-like geometry to one Y(1), one Y(3), and two equivalent Pb(2) atoms.
Y3Pb3N5 crystallizes in the triclinic P-1 space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded to one N(1), one N(5), and two equivalent N(3) atoms to form distorted edge-sharing YN4 trigonal pyramids. The Y(1)-N(1) bond length is 2.31 Å. The Y(1)-N(5) bond length is 2.24 Å. There is one shorter (2.32 Å) and one longer (2.33 Å) Y(1)-N(3) bond length. In the second Y site, Y(2) is bonded in a 4-coordinate geometry to one N(1), one N(2), and two equivalent N(4) atoms. The Y(2)-N(1) bond length is 2.25 Å. The Y(2)-N(2) bond length is 2.34 Å. There is one shorter (2.29 Å) and one longer (2.36 Å) Y(2)-N(4) bond length. In the third Y site, Y(3) is bonded in a 5-coordinate geometry to one N(1), one N(2), one N(3), one N(4), and one N(5) atom. The Y(3)-N(1) bond length is 2.59 Å. The Y(3)-N(2) bond length is 2.32 Å. The Y(3)-N(3) bond length is 2.75 Å. The Y(3)-N(4) bond length is 2.22 Å. The Y(3)-N(5) bond length is 2.35 Å. There are three inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to one N(1) and two equivalent N(2) atoms. The Pb(1)-N(1) bond length is 2.55 Å. There is one shorter (2.34 Å) and one longer (2.37 Å) Pb(1)-N(2) bond length. In the second Pb site, Pb(2) is bonded in a distorted T-shaped geometry to one N(3) and two equivalent N(5) atoms. The Pb(2)-N(3) bond length is 2.35 Å. There is one shorter (2.33 Å) and one longer (2.39 Å) Pb(2)-N(5) bond length. In the third Pb site, Pb(3) is bonded in a 3-coordinate geometry to one N(1), one N(3), and one N(4) atom. The Pb(3)-N(1) bond length is 2.44 Å. The Pb(3)-N(3) bond length is 2.37 Å. The Pb(3)-N(4) bond length is 2.39 Å. There are five inequivalent N sites. In the first N site, N(1) is bonded to one Y(1), one Y(2), one Y(3), one Pb(1), and one Pb(3) atom to form distorted NY3Pb2 trigonal bipyramids that share  a cornercorner with one N(3)Y3Pb2 trigonal bipyramid, corners with two equivalent N(4)Y3Pb trigonal pyramids,  an edgeedge with one N(4)Y3Pb trigonal pyramid, and  a faceface with one N(3)Y3Pb2 trigonal bipyramid. In the second N site, N(2) is bonded in a distorted see-saw-like geometry to one Y(2), one Y(3), and two equivalent Pb(1) atoms. In the third N site, N(3) is bonded to one Y(3), two equivalent Y(1), one Pb(2), and one Pb(3) atom to form distorted NY3Pb2 trigonal bipyramids that share  a cornercorner with one N(1)Y3Pb2 trigonal bipyramid,  an edgeedge with one N(3)Y3Pb2 trigonal bipyramid,  an edgeedge with one N(4)Y3Pb trigonal pyramid, and  a faceface with one N(1)Y3Pb2 trigonal bipyramid. In the fourth N site, N(4) is bonded to one Y(3), two equivalent Y(2), and one Pb(3) atom to form distorted NY3Pb trigonal pyramids that share corners with two equivalent N(1)Y3Pb2 trigonal bipyramids,  an edgeedge with one N(1)Y3Pb2 trigonal bipyramid,  an edgeedge with one N(3)Y3Pb2 trigonal bipyramid, and  an edgeedge with one N(4)Y3Pb trigonal pyramid. In the fifth N site, N(5) is bonded in a distorted rectangular see-saw-like geometry to one Y(1), one Y(3), and two equivalent Pb(2) atoms.