# Molybdite

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> Markdown URL: https://mediated.wiki/source/Molybdite.md
> Source: https://en.wikipedia.org/wiki/Molybdite
> Source revision: 1314224662
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{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](/source/Orthorhombic)
| class       = Dipyramidal (mmm) <br/>[H-M symbol](/source/H-M_symbol): (2/m 2/m 2/m)
| symmetry    = ''Pbnm''
| unit cell   = a = 3.96&nbsp;Å, b = 13.85&nbsp;Å, <br/>c = 3.69&nbsp;Å; Z&nbsp;=&nbsp;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](/source/molybdenum_trioxide) MoO<sub>3</sub>. It occurs as yellow to greenish needles and crystallizes in the [orthorhombic](/source/orthorhombic) [crystal system](/source/crystal_system).

== Discovery and occurrence ==
Molybdite was first described in 1854 for and occurrence in quartz veins in the [Knöttel](/source/Kn%C3%B6ttel) area of [Krupka](/source/Krupka), [Ore Mountains](/source/Ore_Mountains), [Bohemia](/source/Bohemia) (today in the [Ústí nad Labem Region](/source/%C3%9Ast%C3%AD_nad_Labem_Region) of the Czech Republic.<ref name=Mindat/> It occurs in vein cavities and as coatings in [molybdenite](/source/molybdenite) ore veins and [quartz](/source/quartz) [topaz](/source/topaz) [greisen](/source/greisen)s. Associated minerals include molybdenite, [betpakdalite](/source/betpakdalite) and quartz.<ref name=HBM/> The similar mineral [ferrimolybdite](/source/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

{{oxide-mineral-stub}}

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Adapted from the Wikipedia article [Molybdite](https://en.wikipedia.org/wiki/Molybdite) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Molybdite?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.