{{Short description|Sorosilicate mineral}} {{Infobox mineral | name = Sursassite | category = Sorosilicate | boxwidth = | boxbgcolor = | image = Sursassite.jpg | imagesize = | caption = | formula = Mn<sup>2+</sup><sub>2</sub>Al<sub>3</sub>(SiO<sub>4</sub>)(Si<sub>2</sub>O<sub>7</sub>)(OH)<sub>3</sub> | IMAsymbol = Ss<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 = 9.BG.15 | color = Red-brown to copper-red | habit = Botryoidal | system = Monoclinic | class = Prismatic (2/m) <br/><small>(same H-M symbol)</small> | symmetry = ''P''2<sub>1</sub>/m | twinning = | cleavage = [101] Distinct | fracture = | tenacity = | mohs = 3 | luster = Silky, Dull | polish = | refractive = 1.73 to 1.76 | opticalprop = Biaxial | birefringence = 0.030 | dispersion = r > v | pleochroism = Strong; X = Z = colorless to pale yellow; Y = deep golden brown. | fluorescence= | absorption = | streak = yellow-brown | gravity = | density = 3.256 | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Translucent | other = | references =<ref>{{cite web|url=http://un2sg4.unige.ch/athena/cgi-bin/minfich?s=SURSASSITE |publisher=Athena Mineralogy: Mineral Data |author=Pierre Perroud |title=Sursassite}}</ref><ref>[http://rruff.geo.arizona.edu/doclib/hom/sursassite.pdf Sursassite details from Handbook of Mineralogy]</ref> }}
'''Sursassite''' is a sorosilicate mineral. It was first discovered in 1926.<ref>Schweizerische mineralogische und petrographische Mitteilungen (1926), 6, 376-380.</ref> It was first found in the Sursass (Oberhalbstein), a district of Graubünden, Switzerland. It is generally found in deposits of metamorphosed manganese.<ref>{{cite web|url=http://www.webmineral.com/data/Sursassite.shtml|title=Sursassite Mineral Data|last=Barthelmy|first=Dave|publisher=WebMineral|accessdate=2009-03-17}}</ref>
==Notes== {{Reflist}}
Category:Sorosilicates Category:Monoclinic minerals Category:Minerals in space group 11
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