Editing Erbium (section)

===Oxides===

[[File:ErOPulver.jpg|thumb|right|Erbium(III) oxide powder]]

{{Main article|Erbium(III) oxide}}

[[Erbium(III) oxide]] (also known as erbia) is the only known oxide of erbium, first isolated by [[Carl Gustaf Mosander]] in 1843, and first obtained in pure form in 1905 by [[Georges Urbain]] and [[Charles James (chemist)|Charles James]].<ref>{{cite book| pages =378–379| url =https://books.google.com/books?id=34KwmkU4LG0C&pg=PA377| title = The development of modern chemistry| author = Aaron John Ihde| publisher = Courier Dover Publications| year = 1984| isbn = 978-0-486-64235-2}}</ref> It has a [[cubic crystal system|cubic]] structure resembling the [[bixbyite]] motif. The Er<sup>3+</sup> centers are octahedral.<ref name=CR>{{cite journal |doi=10.1021/cr940055h|title=The Binary Rare Earth Oxides |year=1998 |last1=Adachi |first1=Gin-ya |last2=Imanaka |first2=Nobuhito |journal=Chemical Reviews |volume=98 |issue=4 |pages=1479–1514 |pmid=11848940 }}</ref> The formation of erbium oxide is accomplished by burning erbium metal,<ref name="emsley" /> erbium oxalate or other [[oxyacid]] salts of erbium.<ref name=":0">{{Cite book |last1=Larrañaga |first1=Michael D. |url=https://onlinelibrary.wiley.com/doi/book/10.1002/9781119312468 |title=Hawley's Condensed Chemical Dictionary, Sixteenth Edition |last2=Lewis |first2=Richard J. |last3=Lewis |first3=Robert A. |date=September 2016 |publisher=Wiley |isbn=978-1-118-13515-0 |edition=16th |pages=564 |language=en |doi=10.1002/9781119312468}}</ref> Erbium oxide is insoluble in water and slightly soluble in heated mineral acids. The pink-colored compound is used as a [[phosphor]] activator and to produce [[infrared]]-absorbing glass.<ref name=":0" />