Ho5Si3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 5-coordinate geometry to five equivalent Si(1) atoms. In the second Ho site, Ho(2) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to four equivalent Ho(2) and five equivalent Ho(1) atoms.
Ho5Si3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 5-coordinate geometry to five equivalent Si(1) atoms. There are a spread of Ho(1)-Si(1) bond distances ranging from 2.88-3.41 Å. In the second Ho site, Ho(2) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. All Ho(2)-Si(1) bond lengths are 3.02 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Ho(2) and five equivalent Ho(1) atoms.