Y5(FeTe)2 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one Fe(1), two equivalent Fe(2), and four equivalent Te(1) atoms. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to one Fe(2), two equivalent Fe(1), and three equivalent Te(1) atoms. In the third Y site, Y(3) is bonded in a 4-coordinate geometry to one Fe(1), one Fe(2), and two equivalent Te(1) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 9-coordinate geometry to one Y(3), two equivalent Y(1), four equivalent Y(2), and two equivalent Fe(2) atoms. In the second Fe site, Fe(2) is bonded in a 9-coordinate geometry to one Y(3), two equivalent Y(2), four equivalent Y(1), and two equivalent Fe(1) atoms. Te(1) is bonded in a 8-coordinate geometry to one Y(3), three equivalent Y(2), and four equivalent Y(1) atoms.
Y5(FeTe)2 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one Fe(1), two equivalent Fe(2), and four equivalent Te(1) atoms. The Y(1)-Fe(1) bond length is 2.89 Å. Both Y(1)-Fe(2) bond lengths are 2.96 Å. There are two shorter (3.32 Å) and two longer (3.36 Å) Y(1)-Te(1) bond lengths. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to one Fe(2), two equivalent Fe(1), and three equivalent Te(1) atoms. The Y(2)-Fe(2) bond length is 2.97 Å. Both Y(2)-Fe(1) bond lengths are 2.94 Å. There is one shorter (3.18 Å) and two longer (3.19 Å) Y(2)-Te(1) bond lengths. In the third Y site, Y(3) is bonded in a 4-coordinate geometry to one Fe(1), one Fe(2), and two equivalent Te(1) atoms. The Y(3)-Fe(1) bond length is 3.40 Å. The Y(3)-Fe(2) bond length is 2.98 Å. Both Y(3)-Te(1) bond lengths are 3.22 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 9-coordinate geometry to one Y(3), two equivalent Y(1), four equivalent Y(2), and two equivalent Fe(2) atoms. Both Fe(1)-Fe(2) bond lengths are 2.35 Å. In the second Fe site, Fe(2) is bonded in a 9-coordinate geometry to one Y(3), two equivalent Y(2), four equivalent Y(1), and two equivalent Fe(1) atoms. Te(1) is bonded in a 8-coordinate geometry to one Y(3), three equivalent Y(2), and four equivalent Y(1) atoms.