Dundasite
Mineral PbAl2(CO3)2(OH)4·H2O
Take care.
- Contains lead: Wash your hands after handling it, keep it away from children, and don't make dust.
About it
White to pale blue silky spheres and tufts of tiny needles, a lead aluminium carbonate. Named for Dundas, Tasmania, where it grows with red crocoite.
- Type
- Mineral
- Group
- Carbonate (with hydroxide)
- Formula
- PbAl2(CO3)2(OH)4·H2O
- Hardness (Mohs)
- 2
- Specific gravity
- 3.4–3.55
- Streak
- white
- Lustre
- vitreous (glassy), silky
- Crystal system
- Orthorhombic
- Colours
- white, sky blue, pale green
- Transparency
- translucent
- Cleavage and fracture
- perfect in one direction
Typical values: real specimens vary. For more, see mindat.org.