Normal halide, chlorargyrite group, forms a series with marshite
Specific gravity: 5.64
Hardness: 2½ to 3
Streak: Greenish yellow
Solubility: Insoluble in dilute nitric acid; with dilute sulphuric acid and zinc decomposes to metallic silver plus copper (Dana)
Miersite is a rare mineral in the oxidised zone of some
deposits, especially in arid regions
(HOM). It sometimes forms epitaxial intergrowths with iodargyrite
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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