{{distinguish|Molybdenite}} {{infobox mineral | name = Molybdite | image = Molybdite-Molybdenite-233200.jpg | imagesize = 260px | alt = | caption = Molybdite on molybdenite from the Questa Molybdenum Mine (size: 11.0 x 6.7 x 4.1 cm) | category = | formula = MoO<sub>3</sub> | IMAsymbol = Myb<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|url=https://www.cambridge.org/core/journals/mineralogical-magazine/article/imacnmnc-approved-mineral-symbols/62311F45ED37831D78603C6E6B25EE0A|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|url-access=subscription}}</ref> | strunz = 4.EA.10 | dana = | system = Orthorhombic | class = Dipyramidal (mmm) <br/>H-M symbol: (2/m 2/m 2/m) | symmetry = ''Pbnm'' | unit cell = a = 3.96 Å, b = 13.85 Å, <br/>c = 3.69 Å; Z = 4 | color = Light greenish yellow to nearly colorless | habit = Flattened needles or thin plates may occur in aggregates | twinning = | cleavage = Perfect on {100}, district on {001} | fracture = | tenacity = Flexible | mohs = 3 - 4 | luster = Adamantine | streak = White | diaphaneity = Transparent | gravity = 4.72 | density = | polish = | opticalprop = Biaxial (+) | refractive = | birefringence = High | pleochroism = | 2V = Large | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = <ref>{{Cite web|title=Molybdite|url=https://www.mineralienatlas.de/lexikon/index.php/MineralData?lang=en&mineral=Molybdite|access-date=2023-01-15|website=Mineral Atlas | type= database record }}</ref><ref name=HBM>[http://rruff.info/doclib/hom/molybdite.pdf Molybdite on the Handbook of Mineralogy]</ref><ref name=Mindat>{{Cite web|title=Molybdite|url=https://www.mindat.org/min-2748.html|access-date=2023-01-15|website=www.mindat.org| publisher=Hudson Institute of Mineralogy}}</ref><ref name=Webmin>{{Cite web|title=Molybdite Mineral Data|url=http://www.webmineral.com/data/Molybdite.shtml|access-date=2023-01-15|website=www.webmineral.com}}</ref> }} '''Molybdite''' is the naturally occurring mineral form of molybdenum trioxide MoO<sub>3</sub>. It occurs as yellow to greenish needles and crystallizes in the orthorhombic crystal system.
== Discovery and occurrence == Molybdite was first described in 1854 for and occurrence in quartz veins in the Knöttel area of Krupka, Ore Mountains, Bohemia (today in the Ústí nad Labem Region of the Czech Republic.<ref name=Mindat/> It occurs in vein cavities and as coatings in molybdenite ore veins and quartz topaz greisens. Associated minerals include molybdenite, betpakdalite and quartz.<ref name=HBM/> The similar mineral ferrimolybdite is often misidentified as molybdite.<ref name=HBM/>
== References == {{reflist}}
Category:Molybdenum minerals Category:Oxide minerals Category:Orthorhombic minerals Category:Minerals in space group 62
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