Molybdite Mineral Data

Molybdite Mineral Data +

General Molybdite Information

Chemical Formula:

MoO3

Composition:

Molecular Weight = 143.94 gm

Molybdenum 66.65 % Mo 100.00 % MoO₃

Oxygen 33.35 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

MoO₃

IMA Status:

Approved IMA 1963

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 35076

PDF 35-609

Molybdite Image

Images:

Molybdite

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

Molybdite Crystallography

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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.25(1), 3.8(1), 3.45(0.9),

Physical Properties of Molybdite

Cleavage:

[100] Perfect, [001] Distinct

Color:

Colorless, Greenish yellow, Light greenish yellow.

Density:

4.72

Diaphaniety:

Transparent

Hardness:

3-4 - Calcite-Fluorite

Luster:

Adamantine

Streak:

white

Optical Properties of Molybdite

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

Electron Density:

r_electron=4.36 gm/cc
note: r_Molybdite=4.75 gm/cc.

Fermion Index

Fermion Index = 0.16992
Boson Index = 0.83008

Photoelectric:

PE_Molybdite= 111.17 barns/electron
U=PE_Molybdite x r_electron= 484.25 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Molybdite is Not Radioactive

Molybdite Classification

Dana Class:

4.5.1.1 (4)Simple Oxides

(4.5)with a cation charge of 6+ (A++++++ O3)

(4.5.1)Dana Group

4.5.1.1 Molybdite MoO3 Pbnm 2/m 2/m 2/m

Strunz Class:

IV/E.03-10 IV - Oxides

IV/E - Oxides with metal : oxygen < 1:2 (M2O5, MO3)

IV/E.03 - Molybdite - Ilsemannite series

IV/E.03-10 Molybdite MoO3 Pbnm 2/m 2/m 2/m

IV/E.03-20 Sidwillite MoO3·2(H2O) P 2₁/n 2/m

IV/E.03-30 Ilsemannite Mo3O8·n(H2O)(?) None

IV/E.03-40 Bamfordite! FeMo2O6(OH)3·(H2O) P1 or P1 Tri

Other Molybdite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

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Print or Cut-and-Paste your Molybdite Specimen Label here :

Molybdite

MoO3
Dana No: 4.5.1.1 Strunz No: IV/E.03-10
Locality:

Notes: