Dy(Fe2Si)2 crystallizes in the tetragonal P4_2/mnm space group. Dy(1) is bonded in a 6-coordinate geometry to twelve equivalent Fe(1) and six equivalent Si(1) atoms. Fe(1) is bonded in a 12-coordinate geometry to three equivalent Dy(1), six equivalent Fe(1), and three equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to three equivalent Dy(1) and six equivalent Fe(1) atoms.
Dy(Fe2Si)2 crystallizes in the tetragonal P4_2/mnm space group. Dy(1) is bonded in a 6-coordinate geometry to twelve equivalent Fe(1) and six equivalent Si(1) atoms. There are four shorter (3.12 Å) and eight longer (3.19 Å) Dy(1)-Fe(1) bond lengths. There are two shorter (2.82 Å) and four longer (2.89 Å) Dy(1)-Si(1) bond lengths. Fe(1) is bonded in a 12-coordinate geometry to three equivalent Dy(1), six equivalent Fe(1), and three equivalent Si(1) atoms. There are a spread of Fe(1)-Fe(1) bond distances ranging from 2.41-2.69 Å. There is one shorter (2.36 Å) and two longer (2.39 Å) Fe(1)-Si(1) bond lengths. Si(1) is bonded in a 9-coordinate geometry to three equivalent Dy(1) and six equivalent Fe(1) atoms.