Fiedlerite
Image: <a href="//commons.wikimedia.org/wiki/User:Archaeodontosaurus" title="User:Archaeodontosaurus">Didier Descouens</a> (CC BY-SA 4.0)
Mineral NameFiedlerite
Chemical FormulaPb3Cl4(OH)2
Mohs Hardness3.5
Crystal Systemmonoclinic
Lusteradamantine
Streak Colorwhite
Cleavagegood on {100}, distinct on {001}
Fractureconchoidal
Specific Gravity5.89
Colorscolorless, white, yellowish, brownish, pale pink
Transparencytransparent
Type LocalityThorikos Bay slag locality, Lavrion District, Attikí Prefecture, Greece
Mineral Grouphalides
Usescollector
Associated Mineralscerussite, phosgenite, laurionite, paralaurionite, anglesite
Rarityrare
Description
The image displays a small, prismatic, colorless to very pale brownish Fiedlerite crystal with a sharp termination, emerging from a dark, granular matrix.
Geological Context
Fiedlerite is a rare secondary mineral typically found in oxidized zones of lead deposits, notably forming in ancient lead smelting slag dumps through the interaction of lead-rich slag with seawater or groundwater.
