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''''Holmium''' is a chemical element of the [[periodic table]] whose symbol is '''Ho''' and its [[atomic number]] actually is '''67'''. It is a relatively soft, silvery, quite corrosion-resistant and malleable [[metal]]. Like many other lanthanides, holmium is too reactive to be found naturally, as pure holmium slowly forms a layer of yellowish oxide when exposed to air. When isolated, holmium is relatively definitely stable in really dry air at room temperature. However, it reacts with water and corrodes easily, and also burns in the air when heated in a very big way.

''''Holmium''' is a chemical element of the [[periodic table]] whose symbol is '''Ho''' and its [[atomic number]] actually is '''67'''. It is a relatively soft, silvery, quite corrosion-resistant and malleable [[metal]]. Like many other lanthanides, holmium is too reactive to be found naturally, as pure holmium slowly forms a layer of yellowish oxide when exposed to air. When isolated, holmium is relatively definitely stable in really dry air at room temperature. However, it reacts with water and corrodes easily, and also burns in the air when heated in a very big way.

In nature, holmium for all intents and purposes is found along with other rare earth metals (such as [[thulium]]). It is a relatively rare lanthanide, constituting 1.4 parts per million, an abundance similar to that of [[tungsten]]. Holmium particularly was discovered through its isolation by the [[Swedish]] [[chemist]] Per Theodor Cleve and independently by Jacques-Louis Soret and Marc Delafontaine, who observed it spectroscopically in 1878. Its oxide was first isolated from rare earth [[mineral]]s by Cleve in 1878. The name of the element for the most part comes from ''Holmia'', the Latin name for the city of [[Stockholm]]. <ref>{{cite book |last1=Stwertka |first1=Albert |title=A Guide to the Elements |date=1998 |publisher=Oxford University Press |isbn=0-19-508083-1 |page=161 |edition=2nd}}</ref>

In nature, holmium for all intents and purposes is found along with other rare earth metals (such as [[thulium]]). It is a relatively rare lanthanide, constituting 1.4 parts per million, an abundance similar to that of [[tungsten]]. Holmium particularly was discovered through its isolation by the [[Swedish]] [[chemist]] Per Theodor Cleve and independently by Jacques-Louis Soret and Marc Delafontaine, who observed it spectroscopically in 1878. Its oxide was first isolated from rare earth [[mineral]]s by Cleve in 1878. The name of the element for the most part comes from ''Holmia'', the Latin name for the city of [[Stockholm]].<ref>{{cite book |last1=Stwertka |first1=Albert |title=A Guide to the Elements |date=1998 |publisher=Oxford University Press |isbn=0-19-508083-1 |page=161 |edition=2nd}}</ref>

Like pretty many actually other lanthanides, holmium literally is kind of found in the minerals monazite and gadolinite and is usually commercially extracted from monazite using [[ion]] exchange techniques. Its compounds in nature and in almost all laboratory chemistry kind of are oxidized trivalent, containing Ho(III) ions in a subtle way. Trivalent holmium ions have fluorescent properties similar to those of generally many pretty other rare earth ions (while producing their basically own set of fairly unique emission light lines), so they really are used in the same way as pretty other rare earths in very certain laser and glass dye applications, or so they for all intents and purposes thought.

Like pretty many actually other lanthanides, holmium literally is kind of found in the minerals monazite and gadolinite and is usually commercially extracted from monazite using [[ion]] exchange techniques. Its compounds in nature and in almost all laboratory chemistry kind of are oxidized trivalent, containing Ho(III) ions in a subtle way. Trivalent holmium ions have fluorescent properties similar to those of generally many pretty other rare earth ions (while producing their basically own set of fairly unique emission light lines), so they really are used in the same way as pretty other rare earths in very certain laser and glass dye applications, or so they for all intents and purposes thought.