Miersite

minerals

iodargyrite

gerhardtite

likasite

Images
Formula: AgI
Normal halide, chlorargyrite group, forms a series with marshite
Specific gravity: 5.64
Hardness: 2½ to 3
Streak: Greenish yellow
Colour: Yellow
Solubility: Insoluble in dilute nitric acid; with dilute sulphuric acid and zinc decomposes to metallic silver plus copper (Dana)
Environments

Hydrothermal environments

Miersite is a rare mineral in the oxidised zone of some leadzinccoppersilver deposits, especially in arid regions (HOM). It sometimes forms epitaxial intergrowths with iodargyrite (Mindat).

Localities

At the type locality, Broken Hill, Broken Hill district, Yancowinna county, New South Wales, Australia, miersite is associated with iodargyrite, chlorargyrite, malachite, limonite, cerussite and cuprite (HOM, Mindat).

At the Likasi Mine, Likasi, Kambove District, Haut-Katanga, DR Congo, miersite is associated with gerhardtite and likasite (HOM).

At the Mildren Mine group, Ko Vaya, Cababi Mining District, Comobabi Mountains, Tohono O'odom Indian Reservation, Pima county, Arizona, USA, miersite occurs as overgrowths on iodargyrite (Dana).

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