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: 164.93
Density:       13.13
Melting Point: 425.24
Boiling Point: 4.1414