Cotunnite
| Cotunnite | ||
|---|---|---|
2V angle Measured: 67° | | |
| Solubility | Slight in water | |
| References | [2][3][4] | |
Cotunnite is the natural mineral form of
Mohs scale is 1.5–2. The crystal structure is orthorhombic dipyramidal and the point group is 2/m 2/m 2/m. Each Pb has a coordination number of 9. Cotunnite occurs near volcanoes: Vesuvius, Italy; Tarapacá, Chile; and Tolbachik, Russia.[5]
It was first described in 1825 from an occurrence on
Naples Province, Campania, Italy.[3] It was named for Domenico Cotugno (Cotunnius) (1736–1822), Italian physician and Professor of Anatomy.[2]
It was first recognized in
volcanic fumarole deposits. It occurs as a secondary alteration product in lead ore deposits. It has also been reported as an alteration of archaeological objects that contain lead.[2][6]
It occurs in association with
native gold.[2]
References