Pyrolusite
Revision as of 12:19, 27 April 2013 by (username removed)
Description
A manganese dioxide ore that is used as a decolorizer in the manufacture of glass. The lustrous, metallic black ore is mined in various regions of Germany, Brazil, Cuba, Morocco, Ghana, South Africa, India and the U.S.(Georgia, Minnnesota). Pyrolusite is used in the manufacture of ferromanganese, steel and manganese bronze.
Synonyms and Related Terms
glassmaker's soap; pirolusita (Esp.); pirolusite (Port.); Pyrolusit (Deut.); pyrolusiet (Ned.)
Other Properties
Tetragonal crystal system, usually found as massive columns. Cleavage is perfect in one direction. Fracture is splintery; brittle. Luster = metallic to dull. Streak = black to bluish black.
| Mohs Hardness | 2.0 - 2.5 |
|---|---|
| Density | 4.75 |
Additional Information
Mineralogy Database: Pyrolusite