Dy2Co3Si5 is delta Molybdenum Boride-derived structured and crystallizes in the monoclinic C2/c space group. Dy(1) is bonded in a 17-coordinate geometry to two equivalent Co(2), five equivalent Co(1), two equivalent Si(1), two equivalent Si(2), two equivalent Si(3), and four equivalent Si(4) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to five equivalent Dy(1), one Si(1), one Si(3), one Si(4), and two equivalent Si(2) atoms. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to four equivalent Dy(1), two equivalent Co(2), one Si(1), one Si(3), and four equivalent Si(4) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 11-coordinate geometry to four equivalent Dy(1), one Co(2), two equivalent Co(1), two equivalent Si(3), and two equivalent Si(4) atoms. In the second Si site, Si(2) is bonded in a 6-coordinate geometry to four equivalent Dy(1) and four equivalent Co(1) atoms. In the third Si site, Si(3) is bonded in a 11-coordinate geometry to four equivalent Dy(1), one Co(2), two equivalent Co(1), two equivalent Si(1), and two equivalent Si(4) atoms. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to four equivalent Dy(1), one Co(1), two equivalent Co(2), one Si(1), and one Si(3) atom.
Dy2Co3Si5 is delta Molybdenum Boride-derived structured and crystallizes in the monoclinic C2/c space group. Dy(1) is bonded in a 17-coordinate geometry to two equivalent Co(2), five equivalent Co(1), two equivalent Si(1), two equivalent Si(2), two equivalent Si(3), and four equivalent Si(4) atoms. There is one shorter (3.18 Å) and one longer (3.29 Å) Dy(1)-Co(2) bond length. There are a spread of Dy(1)-Co(1) bond distances ranging from 2.93-3.35 Å. There is one shorter (2.96 Å) and one longer (3.08 Å) Dy(1)-Si(1) bond length. There is one shorter (2.90 Å) and one longer (3.12 Å) Dy(1)-Si(2) bond length. There is one shorter (2.95 Å) and one longer (3.13 Å) Dy(1)-Si(3) bond length. There are a spread of Dy(1)-Si(4) bond distances ranging from 2.84-3.08 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to five equivalent Dy(1), one Si(1), one Si(3), one Si(4), and two equivalent Si(2) atoms. The Co(1)-Si(1) bond length is 2.35 Å. The Co(1)-Si(3) bond length is 2.24 Å. The Co(1)-Si(4) bond length is 2.29 Å. There is one shorter (2.27 Å) and one longer (2.31 Å) Co(1)-Si(2) bond length. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to four equivalent Dy(1), two equivalent Co(2), one Si(1), one Si(3), and four equivalent Si(4) atoms. Both Co(2)-Co(2) bond lengths are 2.74 Å. The Co(2)-Si(1) bond length is 2.66 Å. The Co(2)-Si(3) bond length is 2.40 Å. There are two shorter (2.32 Å) and two longer (2.35 Å) Co(2)-Si(4) bond lengths. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a 11-coordinate geometry to four equivalent Dy(1), one Co(2), two equivalent Co(1), two equivalent Si(3), and two equivalent Si(4) atoms. Both Si(1)-Si(3) bond lengths are 2.74 Å. Both Si(1)-Si(4) bond lengths are 2.49 Å. In the second Si site, Si(2) is bonded in a 6-coordinate geometry to four equivalent Dy(1) and four equivalent Co(1) atoms. In the third Si site, Si(3) is bonded in a 11-coordinate geometry to four equivalent Dy(1), one Co(2), two equivalent Co(1), two equivalent Si(1), and two equivalent Si(4) atoms. Both Si(3)-Si(4) bond lengths are 2.47 Å. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to four equivalent Dy(1), one Co(1), two equivalent Co(2), one Si(1), and one Si(3) atom.