File:Pyrolusite_-_USGS_ID_Stose,_GW_1425.jpg · Wikimedia Commons · See Wikimedia Commons
پیرولوزیت
Sign in to savePyrolusite is a mineral consisting essentially of manganese dioxide (MnO2) and is important as an ore of manganese. It is a black, amorphous appearing mineral, often with a granular, fibrous, or columnar structure, sometimes forming reniform crusts. It has a metallic luster, a black or bluish-black streak, and readily soils the fingers. The specific gravity is about 4.8. Its name is from the Greek for fire and to wash, in reference to its use as a way to remove tints from glass. thumb|Acicular radiating pyrolusite
Key facts
- Mineral.name
- Pyrolusite
- Mineral.category
- Oxide minerals
- Mineral.image
- Pyrolusite - USGS ID Stose, GW 1425.jpg
- Mineral.formula
- MnO2
- Mineral.IMAsymbol
- Pyl
- Mineral.strunz
- 4.DB.05
- Mineral.system
- Tetragonal
- Mineral.class
- Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m)
- Mineral.symmetry
- P42/mnm
- Mineral.color
- Darkish, black to lighter grey, sometimes bluish
- Mineral.habit
- Granular to massive: botryoidal. Crystals rare
- Mineral.twinning
- {031}, {032} may be polysynthetic
- Mineral.cleavage
- Perfect on {110}
- Mineral.fracture
- Irregular/Uneven
- Mineral.tenacity
- Brittle
- Mineral.mohs
- 6–6.5, 2 when massive
- Mineral.luster
- Metallic, dull to earthy
- Mineral.refractive
- Opaque
via Wikipedia infobox