{{infobox mineral |boxbgcolor=#856855| name = Pyrophanite | boxtextcolor = #fff | image = File:Pyrophanite-183958.jpg | imagesize = 260px | category = Oxide mineral | formula = MnTiO<sub>3</sub> | IMAsymbol = Pph<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> | strunz = 4.CB.05 | dana = 4.3.5.3 | system = Trigonal | class = Rhombohedral ({{overline|3}}) <br/><small>(same H-M symbol)</small> | symmetry = ''R''{{overline|3}} | unit cell = a = 5.13948(7)&nbsp;Å, <br/>c = 14.2829(4)&nbsp;Å; Z&nbsp;=&nbsp;6 | color = Deep blood-red to greenish black | habit = Rarely as rosettes of hexagonal plates, typically granular, scaly; occurs as exsolution lamenae in franklinite and spinel | cleavage = Perfect on {0221} | fracture = Conchoidal | tenacity = Brittle | mohs = 5–6 | luster = Submetallic | streak = Ochre yellow | diaphaneity = Subtranslucent to opaque | gravity = 4.537 measured | opticalprop = Uniaxial (-) | refractive = n<sub>ω</sub> = 2.481 n<sub>ε</sub> = 2.210 | birefringence = δ = 0.271 | impurities =Fe, Zn | references = <ref name=HBM>[http://rruff.info/doclib/hom/pyrophanite.pdf Pyrophanite in the Handbook of Mineralogy]</ref><ref name=Mindat>[http://www.mindat.org/min-3322.html Pyrophanite on Mindat.org]</ref><ref name=Webmin>[http://www.webmineral.com/data/Pyrophanite.shtml Pyrophanite data on Webmineral]</ref> }} '''Pyrophanite''' is a manganese titanium oxide mineral with formula: MnTiO<sub>3</sub>. It is a member of the ilmenite group. It is a deep red to greenish black mineral which crystallizes in the trigonal system.

==Discovery and occurrence== It was first described in 1890 from an occurrence in the Harstigen Mine, Filipstad, Värmland, Sweden.<ref name=Mindat/> Its name was derived from the Greek ''πΰρ,'' fire, and ''φαίνεσθαι,'' to appear, because of the deep red color of the mineral.<ref name=Mindat/>

Its main occurrence is in manganese deposits that have undergone metamorphism. It also occurs in granite, amphibolite and serpentinite as an uncommon accessory mineral. Associated minerals include ilmenite, geikielite, hematite, spinel, gahnite, chromite, magnetite, ganophyllite, manganophyllite, hendricksite, garnet and calcite.<ref name=HBM/>

==References== {{reflist}}

Category:Oxide minerals Category:Manganese(II) minerals Category:Titanium minerals Category:Trigonal minerals Category:Minerals in space group 148

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