Laurionite
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Description
A rare halide mineral composed of lead chloride hydroxide. Laurionite crystals occurs as colorless, transparent, striated prisms. They were first identified in ancient lead slags at Laurium, Greece. Deposits are also found in Wheal Rose, England. Laurionite forms when saline containing water comes in contact with lead.
Synonyms and Related Terms
lead chloride hydroxide
Physical and Chemical Properties
- Fine, colorless, orthorhombic, tabular crystals.
- Fracture= uneven
- Luster = pearly to adamantine
- Streak = white
| Composition | PbClOH |
|---|---|
| Mohs Hardness | 2.5-3.5 |
| Density | 6.24 g/ml |
| Molecular Weight | 259.66 |
| Refractive Index | 2.077; 2.116; 2.158 |
Resources and Citations
- Mindat at http://www.mindat.org/min-2343.html (accessed Nov 19, 2008) Hardness=3.0-3.5
- Web Minerals at http://www.webmineral.com/data/Laurionite.shtml (accessed Nov 19, 2008) Hardness=2.5-3.0