{{Infobox mineral | name = Xanthiosite | category = Arsenate mineral | boxwidth = | boxbgcolor = | image = Aerugite-154934 cropped.jpg | imagesize = | caption = Xanthiosite and aerugite | formula = Ni<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub> | IMAsymbol = Xth<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 = 453.91 g/mol | strunz = 8.AB.25 | system = Monoclinic | class = Prismatic (2/m) <br/><small>(same H-M symbol)</small> | symmetry = ''P''2<sub>1</sub>/a | color = Golden yellow | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = 4 | luster = | polish = | refractive = | opticalprop = | birefringence = | dispersion = | pleochroism = | fluorescence= | absorption = | streak = | gravity = 5.37–5.47 | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Translucent | other = | references =<ref>[http://webmineral.com/data/Xanthiosite.shtml Xanthiosite mineral data from Webmineral]</ref><ref name=Mindat>[http://www.mindat.org/min-4327.html Mindat.org]</ref> }}
'''Xanthiosite''' is a nickel arsenate mineral. It was first discovered in Germany in 1858{{cn|date=October 2024}} and named by Gilbert Joseph Adam in 1869.<ref name=Mindat/>
==Deposits== The type locality of Xanthiosite is Johanngeorgenstadt,<ref name=Mindat/> it may also be found in Greece.{{cn|date=October 2024}}
==References== {{reflist}}
Category:Arsenate minerals Category:Nickel minerals Category:Monoclinic minerals Category:Minerals in space group 14 Category:Minerals described in 1858
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