Holmium - Ho
Holmium is a melleable, soft, lustrous metal with a silvery colour, belonging to the lantanides series of the periodic chart of elements. It is slowly attacked by oxygen and water and dissolves in acids. It is stable in dry air at room temperature.
Holmium alloys are used as a magnetic flux concentrator to create the strongest artificially-generated magnetic fields. It is also used in nuclear reactors for nuclear control rods. Holmium oxide is used as yellow gas colouring.
Holmium in the environment
Holmium is one of the rarer of the rare-earth elements but is, nevertheless, 20 times more abundant than silver. Like all other rare earths, holmium is not naturally found as free element. It is found in minerals such as monazite and bastanasite, even if it is just a minor components of such ores.
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