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Molybdite Mineral Data

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General Molybdite Information

Help on Chemical  Formula: Chemical Formula: MoO3
Help on Composition: Composition: Molecular Weight = 143.94 gm
   Molybdenum  66.65 %  Mo  100.00 % MoO3
   Oxygen      33.35 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MoO3
Help on Environment: Environment: In cavities in topaz-quartz greisen.
Help on IMA Status: IMA Status: Approved IMA 1963
Help on Locality: Locality: Krupka, northwestern Bohemia, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition.
Help on Name Pronunciation: Name Pronunciation: Molybdite + Pronunciation Say MOLYBDITE
Help on Synonym: Synonym: ICSD 35076
  PDF 35-609

Molybdite Image

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Comments: Greenish yellow molybdite crust on quartz.
Location: Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Molybdite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.2863:1:0.2672
Help on Cell Dimensions: Cell Dimensions: a = 3.954, b = 13.808, c = 3.69, Z = 4; V = 201.46 Den(Calc)= 4.75
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.25(1), 3.8(1), 3.45(0.9),

Physical Properties of Molybdite

Help on Cleavage: Cleavage: {100} Perfect, {001} Distinct
Help on Color: Color: Colorless, Greenish yellow, Light greenish yellow.
Help on Density: Density: 4.72
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white

Optical Properties of Molybdite

Help on Optical Data: Optical Data: NCalc= 2.13 - from Gladstone-Dale relationship (KC = 0.237) where Ncalc=Dcalc*KC+1
NCalc= 2.12 - from Gladstone-Dale relationship (KC = 0.237) where Ncalc=Dmeas*KC+1

Calculated Properties of Molybdite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.36 gm/cc
note: Specific Gravity of Molybdite =4.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.16
Boson Index = 0.84
Help on Photoelectric: Photoelectric: PEMolybdite = 111.17 barns/electron
U=PEMolybdite x rElectron Density= 484.25 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Molybdite is Not Radioactive

Molybdite Classification

Help on  Dana Class: Dana Class: (04)Simple Oxides
  (04.05)with a cation charge of 6+ (A++++++ O3)
  (04.05.01)Dana Group Molybdite MoO3 Pbnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.EA.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.E - Metal:Oxygen = < 1:2
  04.EA -Oxides with metal : oxygen < 1:2 (M2O5, MO3)
04.EA.10 Krasnogorite* WO3 Pmnb 2/m 2/m 2/m
04.EA.10 Molybdite MoO3 Pbnm 2/m 2/m 2/m

Other Molybdite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Molybdite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Scandinavian mineral gallery

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Dana No: Strunz No: 04.EA.10





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