Jamesite

jamesite

Images

Formula: Pb₂ZnFe³⁺₂(Fe³⁺,Zn)₄(AsO₄)₄(OH)₈(OH,O)₂
Arsenate
Crystal System: Triclinic
Specific gravity: 5.084 calculated
Hardness: 3
Streak: Pale brown
Colour: Reddish brown
Solubility: Soluble, with difficulty, in hot nitric acid and hydrochloric acid
Environments

Hydrothermal environments

Localities

At the type locality, the Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia, jamesite occurs as a secondary mineral in oxidised lead ore in a dolostone-hosted hydrothermal polymetallic ore deposit. Associated minerals include duftite, tsumcorite and goethite (HOM).
Jamesite from the Tsumeb Mine - Image

Back to Minerals