cornwallite

== English == === Etymology === Named for type locality, Cornwall (England) +‎ -ite. === Noun === cornwallite (uncountable) (mineralogy) A basic copper arsenate mineral with chemical formula Cu5(AsO4)2(OH)4. ==== See also ==== cornubite (dimorph of cornwallite) === Further reading === David Barthelmy (1997–2026), “Cornwallite”, in Webmineral Mineralogy Database. “cornwallite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.