Mineral description : Molybdite

Molybdite from Bastnäs. As yellow oxidation products around molybdenite.
Molybdite from Bastnäs. As a yellow crust on a piece of molybdenite.

Mineral class Oxides : Ockra - Tellurite group.
Chemical formula MoO3
Crystal system Orthorhombic
Habitus As earthy masses or thin surfaces.
Density 4.72
Color Greenish yellow to grayish yellow.
Luster Dull.
Occurance As a secondary mineral created by oxidation of molybdenite.
Associates Molybdenite
Notes First publication in 1858 by Greg & Lettsom.
Locations Relatively rare in Sweden.
  • Bispbergs molybden mine, Säter. As tarnish on molybdenite.
  • Bastnäs, Riddarhyttan, Västmanland. As yellow tarnish and surfaces on molybdite.

To oxide index.
Mineral group index.
Main index.

If you have some questions, suggestions or comments you are welcome to write me a line or two.

To my homepage.
Last changed : 1998-08-01