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cotunnite
Cotunnite is the natural mineral form of lead(II) chloride with formula PbCl2.
It was first described in 1825 from an occurrence on Mount Vesuvius, Naples Province, Campania, Italy.〔 It was named for Domenico Cotugno (Cotunnius) (1736–1822), Italian physician and Professor of Anatomy.〔
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.〔〔(Late-Hellenistic shipwreck, Mahdia, Tunisia, (Mindat locality) )〕
It occurs in association with galena, cerussite, anglesite and matlockite in the Caracoles, Chile. At the Tolbachik volcano on the Kamchatka Peninsula, Russia it occurs with the rare to uncommon minerals tenorite, ponomarevite, sofiite, burnsite, ilinskite, georgbokite, chloromenite, halite, sylvite and native gold.〔
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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