ErCoSi crystallizes in the orthorhombic Pnma space group. Er(1) is bonded in a 9-coordinate geometry to four equivalent Co(1) and six equivalent Si(1) atoms. Co(1) is bonded in a 8-coordinate geometry to four equivalent Er(1) and four equivalent Si(1) atoms. Si(1) is bonded in a 10-coordinate geometry to six equivalent Er(1) and four equivalent Co(1) atoms.
ErCoSi crystallizes in the orthorhombic Pnma space group. Er(1) is bonded in a 9-coordinate geometry to four equivalent Co(1) and six equivalent Si(1) atoms. There are a spread of Er(1)-Co(1) bond distances ranging from 2.78-2.87 Å. There are a spread of Er(1)-Si(1) bond distances ranging from 2.88-3.09 Å. Co(1) is bonded in a 8-coordinate geometry to four equivalent Er(1) and four equivalent Si(1) atoms. There are a spread of Co(1)-Si(1) bond distances ranging from 2.34-2.50 Å. Si(1) is bonded in a 10-coordinate geometry to six equivalent Er(1) and four equivalent Co(1) atoms.