Article
Article
Holmium
Article By:
Spedding, Frank H. Formerly, Ames Laboratory, Energy Research and Development Administration, Iowa State University, Ames, Iowa.
Last reviewed:January 2020
DOI:https://doi.org/10.1036/1097-8542.320600
A chemical element, Ho, atomic number 67, atomic weight 164.93, a metallic element belonging to the rare-earth group. The stable isotope 165Ho makes up 100% of the naturally occurring element. The metal is paramagnetic, but as the temperature is lowered, it changes to antiferromagnetic and then to the ferromagnetic system. See also: Antiferromagnetism; Periodic table; Rare-earth elements
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