Metallic crystals of the extremely rare Ni-Hg sulphide mineral donharrisite from a locality in Spain: El Entredicho, Almadenejos, Ciudad Real, Castilla La Mancha, Spain. See the article about the locality and the find including analysis in Paragenesis 2024-2 : "La corta El Entredicho , Almadenejos, Ciudad Real, Castilla-La Mancha, Spain"., p.3-40 by Borja Sainz de Baranda, Cesar Menor Salvan, Antonino Bueno Yanes. — Photo: David Hospital · CC BY 4.0
Donharrisite
Donharrisite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Ni₃HgS₃.
It crystallizes in the monoclinic crystal system.
Key properties: Mohs hardness 2; specific gravity 5.18; Brownish gray streak; Metallic luster.
IMA symbol Dhr, IMA status: approved, named in 1987.
On an old museum specimen from a polymetallic Hg–Pb-rich dolostone stratabound ore deposit.
It is found associated with Cinnabar, mercury, polydymite, galena, sphalerite, tennantite, pyrite.
The mineral was named to honor Dr. Donald C. Harris (1936–), Geological Survey of Canada, Ottawa, Canada, for his contributions to ore mineralogy.