Mineralogy Database

Molybdenite Mineral Data

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General Molybdenite Information

Help on Chemical  Formula: Chemical Formula: MoS2
Help on Composition: Composition: Molecular Weight = 160.07 gm
   Molybdenum  59.94 %  Mo
   Sulfur      40.06 %  S
              ______ 
              100.00 % 
Help on Empirical Formula: Empirical Formula: MoS2
Help on Environment: Environment: High temperature hydrothermal veins. Important in disseminated deposits of the porphyry type.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1807
Help on Locality: Locality: Common world wide occurrences. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Greek, molybdos = "lead."
Help on Name Pronunciation: Name Pronunciation: Molybdenite + Pronunciation Say MOLYBDENITE
Help on Synonym: Synonym: Castaingite-(Cu)
  Molybdic ochre
  Muchuanite - mixture of molybdenite and jordisite
 

Molybdenite Image

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  Molybdenite

Comments: Sharp metallic molybdenite crystal on matrix.
Location: Crown Point Mine, Washington. Scale: 4x4x2.3 cm.
© Isaias Casanova / IC Minerals

Molybdenite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.8924
Help on Cell Dimensions: Cell Dimensions: a = 3.16, c = 12.3, Z = 2; V = 106.37 Den(Calc)= 5.00
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.15(1), 2.277(0.45), 1.83(0.25),
Help on Forms: Forms:

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Drag1 - Manipulate Crystal
Drag2 - Resize

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I - Indicies
<space> - Start-Stop Rotation
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Help on Above

Forms: ( 1 0 2) ( 1 0 1) ( 0 1 0) ( 0 0 1)

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Physical Properties of Molybdenite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Black, Lead gray, Gray.
Help on Density: Density: 5.5
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Habit: Habit: Foliated - Two dimensional platy forms.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 1 - Talc
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: greenish gray
 

Optical Properties of Molybdenite

Help on RL Anisotrophism: RL Anisotrophism: Very strong.
Help on RL Color: RL Color: Gray, very pale yellow to deep reddish brown in transmitted light.
Help on RL Pleochroism: RL Pleochroism: Very strong.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Molybdenite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   21.00   55.00 
   
 420 nm   22.20   54.80 
 440 nm   23.40   54.60 
 460 nm   24.10   53.80 
 480 nm   23.80   52.30 
 500 nm   22.70   49.70 
 520 nm   21.90   47.10 
 540 nm   21.30   45.50 
 560 nm   20.90   44.40 
 580 nm   20.60   44.00 
 600 nm   20.40   44.60 
 620 nm   20.20   45.30 
 640 nm   20.00   45.70 
 660 nm   20.00   45.60 
 680 nm   19.90   45.40 
 700 nm   19.70   44.20 
Calculated Relative Intensity Colors of Molybdenite in Air
Relative
Intensity
   0%   50% 100% 150% 200% 250% 300% 350% 400% 430%
R1                    
R2                    
 

Calculated Properties of Molybdenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.62 gm/cc
note: Specific Gravity of Molybdenite =5.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PEMolybdenite = 101.34 barns/electron
U=PEMolybdenite x rElectron Density= 468.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Molybdenite is Not Radioactive
 

Molybdenite Classification

Help on  Dana Class: Dana Class: 02.12.10.01 (02)Sulfides - Including Selenides and Tellurides
  (02.12)where Am Bn Xp, with (m+n):p=1:2
  (02.12.10)Molybdenite Group
 
02.12.10.01 Molybdenite MoS2 P 63/mmc 6/m 2/m 2/m
 
02.12.10.02 Drysdallite Mo(Se,S)2 P 63/mmc 6/m 2/m 2/m
 
02.12.10.03 Tungstenite WS2 P 63/mmc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.EA.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.E - Metal Sulfides, M:S � 1:2
  02.EA -M:S = 1:2
 
02.EA.30 Drysdallite Mo(Se,S)2 P 63/mmc 6/m 2/m 2/m
 
02.EA.30 Jordisite MoS2 None
 
02.EA.30 Molybdenite MoS2 P 63/mmc 6/m 2/m 2/m
 
02.EA.30 Tungstenite WS2 P 63/mmc 6/m 2/m 2/m
 

Other Molybdenite Information

Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Molybdenite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - Franklin Minerals(Palache)
7 - GeoScienceWorld
8 - Glendale Community College
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - Scandinavian mineral gallery
19 - WWW-MINCRYST
20 - YupRocks
21 - theimage

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Molybdenite

MoS2
Dana No: 02.12.10.01 Strunz No: 02.EA.30
Locality:

 

Notes:

 

 
   
 


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