What Is Holmium

Name Origin
From Holmia, the Latin name for Stockholm.
"Holmium" in different languages.

Sources
Occurs in gadolinite ((Ce,La,Nd,Y)2FeBe2Si2O10), monazite and other rare-earth minerals. Annual production is around 10 tons.




Abundance
Universe: 0.0005 ppm (by weight)
Carbonaceous meteorite: 0.06 ppm
Earth's Crust: 1.4 ppm
Seawater: Atlantic surface: 2.4 x 10-7 ppm Atlantic deep: 2.9 x 10-7 ppm Pacific surface: 1.6 x 10-7 ppm Pacific deep: 1.6 x 10-7 ppm




Uses
As control-rods for nuclear reactors because it readily absorbs neutrons. Forms highly magnetic compounds when combined with yttrium. Holmium oxide is used as a yellow glass colouring.
Its very high magnetic moment is suitable for use in yttrium-iron-garnet (YIG) and yttrium-lanthanum-fluoride (YLF) solid state lasers found in microwave equipment (which are in turn found in a variety of medical and dental settings).

Category:

Science & Technology

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