{{Short description|Uranyl phosphate mineral}} {{Infobox mineral | name = Ulrichite | boxwidth = | boxbgcolor = | image = Ulrichite-27441.jpg | imagesize = 260px | alt = | caption = Ulrichite (three green vugs) | category = Phosphate mineral | formula = CaCu(UO<sub>2</sub>)[PO<sub>4</sub>]<sub>2</sub>·4H<sub>2</sub>O | IMAsymbol = Ulr<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref> | molweight = | strunz = 8.EA.15 | system = Monoclinic | class = Prismatic (2/m) <br/><small>(same H-M symbol)</small> | symmetry = ''P''2<sub>1</sub>/c | unit cell = | color = | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = | luster = | streak = | diaphaneity = | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = 25px Radioactive | prop1 = | prop1text = | references = }}
'''Ulrichite''' is a rare green uranium phosphate mineral (CaCu(UO<sub>2</sub>)[PO<sub>4</sub>]<sub>2</sub>·4H<sub>2</sub>O).<ref name=Mindat>[http://www.mindat.org/min-4088.html Mindat]</ref> It crystallizes as monoclinic prisms which occur as apple green acicular radiating clusters.<ref name=HBM/> It is radioactive and exhibits strong yellow fluorescence under ultraviolet radiation.<ref name=Mindat/>
Ulrichite was first described in 1988 for samples from the Lake Boga granite quarry, Lake Boga, Victoria, Australia. It was named for George H. F. Ulrich (1830–1900),<ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/ulrichite.pdf Handbook of Mineralogy]</ref> a 19th-century government geologist and mines department inspector. The type locality at Lake Boga is the only reported occurrence and the type specimen is located at the Museum Victoria, Melbourne, Australia, as #M38576.<ref name=HBM/>
It is of secondary origin in granite pegmatites where it is found in miarolitic cavities. It occurs associated with turquoise, chalcosiderite, cyrilovite, torbernite, libethenite, sampleite, saleeite and fluorapatite.<ref name=HBM/>
== References == {{Reflist}}
Category:Copper(II) minerals Category:Uranium(VI) minerals Category:Phosphate minerals Category:Monoclinic minerals Category:Minerals in space group 14
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