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more about holmium
holmium |
3 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Holmium \Hol"mi*um\, n. [NL., of uncertain origin.] (Chem.) A rare element said to be contained in gadolinite. -- {Hol"mic}, a. From WordNet r 1.6 [wn]: holmium n : a trivalent metallic element of the rare earth group occurs together with yttrium; forms highly magnetic compounds [syn: {Ho}, {atomic number 67}] From Elements database 20001107 [elements]: holmium Symbol: Ho Atomic number: 67 Atomic weight: 167.26 Relatively soft and malleable silvery-white metallic element, which is stable in dry air at room temperature. It oxidizes in moist air and at high temperatures. It belongs to the lanthanoids. A rare-earth metal, it is found in the minerals monazite and gadolinite. It possesses unusual magnetic properties. One natural isotope, Ho-165 exists, six radioisotopes exist, the most stable being Ho-163 with a half-life of 4570 years. Holmium is used in some metal alloys, it is also said to stimulate the metabolism. Discovered by Per Theodor Cleve and J.L. Soret in Switzerland in 1879. The name homium comes from the Greek word Holmia which means Sweden. While all holmium compounds should be considered highly toxic, initial evidence seems to indicate that they do not pose much danger. The metal's dust however, is a fire hazard.
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