Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare-earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve. Elemental holmium is a relatively soft and malleable silvery-white metal.

Atomic Weight: 5252
Density:       2424 g/cm3
Melting Point: 252
Boiling Point: 44