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Molybdite

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Terril St. Charles (slag locality), Ransart, Charleroi, Hainaut (Henegouwen; Hennegau) Province, Belgium
© Elmar Lackner

Show Molybdite Photos (20)
Formula:
MoO
 
3
System:OrthorhombicHardness:3 - 4
This page provides mineralogical data about Molybdite.

Classification of Molybdite

IMA status:Approved
Strunz 8th edition ID:4/E.03-10
Nickel-Strunz 10th (pending) edition ID:4.EA.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
E : Metal: Oxygen = < 1 :2
A :
Dana 8th edition ID:4.5.1.1

4 : SIMPLE OXIDES
5 : AX3
Hey's CIM Ref.:7.15.2

7 : Oxides and Hydroxides
15 : Oxides of Mo and W
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Type Occurrence of Molybdite

Type Locality:Quartz vein outcrops, Knöttel (Knötel; Knödel) area, Krupka (Graupen), Krušné Hory Mts (Erzgebirge), Ústí Region, Bohemia (Böhmen; Boehmen), Czech Republic
Year of Discovery:1854

Physical Properties of Molybdite

Hardness (Mohs):3 - 4

Crystallography of Molybdite

Crystal System:Orthorhombic
Cell Parameters:a = 3.96Å, b = 13.85Å, c = 3.69Å
Ratio:a:b:c = 0.286 : 1 : 0.266
Unit Cell Volume:V 202.38 ų (Calculated from Unit Cell)
Crystal Atlas:
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Molybdite - {010}, {111}, {100}
Molybdite - {010}, {111}, {100}, {001}

About Crystal Atlas

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The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. You need Java to see these. You can download Java for free - click here to download Java

The 3d models and java code are kindly provided by www.smorf.nl. You can control the movement of the models by holding down the left mouse-button over the 3d model and moving your mouse. Keyboard controls are:

: default positions
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Chemical Properties of Molybdite

Formula:
MoO
 
3
Essential elements:Mo, O
All elements listed in formula:Mo, O

Relationship of Molybdite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.EA.05Tantite
Ta
 
2
O
 
5
4.EA.10Krasnogorite
WO
 
3
Related Minerals - Hey's Index Grouping:

- +
7.15.1Tugarinovite
MoO
 
2
7.15.3Sidwillite
MoO
 
3
·2H
 
2
O
7.15.4Ilsemannite
Mo
 
3
O
 
8
·nH
 
2
O
7.15.5Tungstite
WO
 
3
·H
 
2
O
7.15.6Hydrotungstite
WO
 
3
·2H
 
2
O
7.15.7Meymacite
WO
 
3
·2H
 
2
O
7.15.8Alumotungstite
(W,Al)(O,OH)
 
3
7.15.9Jixianite
Pb(W,Fe
3+
 
)
 
2
(O,OH)
 
7

Other Names for Molybdite

Other Languages:
French:Acide molybdique
German:Molybdit
Russian:Молибдит
Spanish:Molybdita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Molybdite

Reference List:American Mineralogist (1964): 49: 1497.

Internet Links for Molybdite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Molybdite in the Natural History Museum (London) online catalogue
  • Molybdite details from Handbook of Mineralogy (PDF)
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    Localities for Molybdite

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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 29th Nov 2009 18:57:30