Plattnerite
Mineral PbO2
Take care.
- Contains lead: Wash your hands after handling it, keep it away from children, and don't make dust.
About it
Jet-black, very heavy crystals and sooty to botryoidal crusts with a chestnut-brown streak, in the oxidized zones of lead deposits. The Ojuela mine at Mapimí, Mexico, is famous for it.
- Type
- Mineral
- Group
- Oxide, rutile group
- Formula
- PbO2
- Hardness (Mohs)
- 5.5
- Specific gravity
- 8.5–9.6
- Streak
- chestnut brown
- Lustre
- submetallic, adamantine (diamond-like)
- Crystal system
- Tetragonal
- Colours
- black, brownish black
- Transparency
- opaque
- Cleavage and fracture
- none; conchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.