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Molybdite Mineral Data
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General Molybdite Information
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 Chemical Formula: |
MoO3 |
| Composition: |
Molecular Weight = 143.94 gm |
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Molybdenum 66.65 % Mo 100.00 % MoO3 |
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Oxygen 33.35 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
MoO3 |
| Environment: |
In cavities in topaz-quartz greisen. |
| IMA Status: |
Approved IMA 1963 |
| Locality: |
Krupka, northwestern Bohemia, Czech Republic. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the composition. |
| Name Pronunciation: |
Molybdite + Pronunciation  |
| Synonym: |
ICSD 35076 |
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PDF 35-609 |
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Molybdite Image |
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Images:
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Molybdite Crystallography
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| Axial Ratios: |
a:b:c =0.2863:1:0.2672 |
| Cell Dimensions: |
a = 3.954, b = 13.808, c = 3.69, Z = 4; V = 201.46 Den(Calc)= 4.75 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm |
| X Ray Diffraction: |
By Intensity(I/Io): 3.25(1), 3.8(1), 3.45(0.9), |
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Physical Properties of Molybdite
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| Cleavage: |
{100} Perfect, {001} Distinct |
| Color: |
Colorless, Greenish yellow, Light greenish yellow. |
| Density: |
4.72 |
| Diaphaneity: |
Transparent |
| Hardness: |
3-4 - Calcite-Fluorite |
| Luster: |
Adamantine |
| Streak: |
white |
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Optical Properties of Molybdite
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| 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 |
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Calculated Properties of Molybdite
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| Electron Density: |
Bulk Density (Electron Density)=4.36 gm/cc
note: Specific Gravity of Molybdite =4.75 gm/cc.
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| Fermion Index: |
Fermion Index = 0.16
Boson Index = 0.84 |
| Photoelectric: |
PEMolybdite = 111.17 barns/electron
U=PEMolybdite x rElectron Density= 484.25 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Molybdite is Not Radioactive |
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Molybdite Classification
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| Dana Class: |
04.05.01.01 (04)Simple Oxides |
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(04.05)with a cation charge of 6+ (A++++++ O3) |
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(04.05.01)Dana Group |
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04.05.01.01 Molybdite MoO3 Pbnm 2/m 2/m 2/m |
| Strunz Class: |
04.EA.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.E - Metal:Oxygen = < 1:2 |
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04.EA -Oxides with metal : oxygen < 1:2 (M2O5, MO3) |
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04.EA.10 Krasnogorite* WO3 Pmnb 2/m 2/m 2/m |
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04.EA.10 Molybdite MoO3 Pbnm 2/m 2/m 2/m |
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Other Molybdite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| 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
16 - WWW-MINCRYST
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Print or Cut-and-Paste your Molybdite Specimen Label here :
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Molybdite
MoO3
Dana No: 04.05.01.01 Strunz No: 04.EA.10
Locality:
Notes:
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