FeCoSi crystallizes in the orthorhombic Pnma space group. Fe(1) is bonded in a 13-coordinate geometry to two equivalent Fe(1), six equivalent Co(1), and five equivalent Si(1) atoms. Co(1) is bonded in a 13-coordinate geometry to six equivalent Fe(1), two equivalent Co(1), and five equivalent Si(1) atoms. Si(1) is bonded in a 10-coordinate geometry to five equivalent Fe(1) and five equivalent Co(1) atoms.
FeCoSi crystallizes in the orthorhombic Pnma space group. Fe(1) is bonded in a 13-coordinate geometry to two equivalent Fe(1), six equivalent Co(1), and five equivalent Si(1) atoms. Both Fe(1)-Fe(1) bond lengths are 2.47 Å. There are a spread of Fe(1)-Co(1) bond distances ranging from 2.49-2.73 Å. There are a spread of Fe(1)-Si(1) bond distances ranging from 2.41-2.54 Å. Co(1) is bonded in a 13-coordinate geometry to six equivalent Fe(1), two equivalent Co(1), and five equivalent Si(1) atoms. Both Co(1)-Co(1) bond lengths are 2.73 Å. There are a spread of Co(1)-Si(1) bond distances ranging from 2.31-2.61 Å. Si(1) is bonded in a 10-coordinate geometry to five equivalent Fe(1) and five equivalent Co(1) atoms.