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.
Cleavage  
Hardness  
Density 4.72
Color Greenish yellow to grayish yellow.
Streak  
Luster Dull.
Description  
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.

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Last changed : 1998-08-01