Holmium diantimonide is an inorganic compound with the chemical formula HoSb<sub>2</sub>. It is one of the antimonides of holmium. It can be obtained by reacting holmium and antimony at a certain temperature (1000~1500 ðC) and pressure (30~65 kbar). X-ray diffraction shows its space group C222, unit cell parameters a=3.343 à, b=5.790 à, c=7.840 à, Z=2.
HoSb<sub>2</sub> is also the crystal structure prototype of some compounds. Compounds belonging to the HoSb<sub>2</sub> structure include LuSb<sub>2</sub>, YSb<sub>2</sub>, etc.