Fiedlerite

minerals

penfieldite

paralaurionite

Formula: Pb3Cl4F(OH).H2O
Hydroxyhalide
Specific gravity: 5.88
Hardness: 3½
Streak: White
Colour: Colourless, white; colourless in transmitted light
Solubility: Soluble in nitric acid
Environments

Hydrothermal environments

Fiedlerite is a secondary mineral produced by reaction of halide-bearing seawater and metal-bearing slag (HOM, Webmin).

Localities

At the type locality, Lavrion slag localities, Lavreotiki, East Attica, Attica, Greece, fiedlerite is associated with penfieldite, laurionite, phosgenite and cotunnite (HOM).

At the Baratti slag locality, Piombino, Livorno Province, Tuscany, Italy, fiedlerite is associated with penfieldite and cotunnite (HOM).

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