Editing Dysprosium (section)

===Physical properties===
[[Image:Dysprosium.jpg|thumb|upright=0.4|left|Dysprosium sample]]
Dysprosium is a [[rare-earth element]] and has a metallic, bright silver luster. It is quite soft and can be machined without sparking if overheating is avoided. Dysprosium's physical characteristics can be greatly affected by even small amounts of impurities.<ref name="CRC">{{Cite book |editor = Lide, David R. |chapter = Dysprosium |year = 2007–2008 |title = CRC Handbook of Chemistry and Physics |volume = 4 |pages = 11 |location = New York |publisher = CRC Press |isbn = 978-0-8493-0488-0}}</ref>

Dysprosium and [[holmium]] have the highest magnetic strengths of the elements,<ref name="nbb" /> especially at low temperatures.<ref name="krebs" /> Dysprosium has a simple [[ferromagnetic]] ordering at temperatures below its [[Curie temperature]] of {{convert|90.5|K|C}}, at which point it undergoes a first-order phase transition from the [[Orthorhombic crystal system|orthorhombic crystal structure]] to [[hexagonal close-packed]] (hcp).<ref name="Arblaster 2018" /><!--Citation is defined in infobox: {{cite book |last=Arblaster |first= John W. |title=Selected Values of the Crystallographic Properties of Elements |publisher=ASM International |publication-place=Materials Park, Ohio |date=2018 |isbn=978-1-62708-155-9}}--> It then has a [[Helimagnetism|helical antiferromagnetic]] state, in which all of the atomic magnetic moments in a particular [[basal plane]] layer are parallel and oriented at a fixed angle to the moments of adjacent layers. This unusual antiferromagnetism transforms into a disordered ([[paramagnetic]]) state at {{convert|179|K|C}}.<ref>{{cite journal |journal = IRM Quarterly |year = 2000 |volume = 10 |issue = 3 |page = 6 |author = Jackson, Mike |url = http://www.irm.umn.edu/quarterly/irmq10-3.pdf |title = Wherefore Gadolinium? Magnetism of the Rare Earths |access-date = 2009-05-03 |archive-url = https://web.archive.org/web/20170712151422/http://www.irm.umn.edu/quarterly/irmq10-3.pdf |archive-date = 2017-07-12 |url-status = dead}}</ref> It transforms from the hcp phase to the [[body-centered cubic]] phase at {{convert|1654|K|C}}.<ref name="Arblaster 2018" />