atacamite


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atacamite

[‚ad·ə′kam‚īt]
(mineralogy)
Cu2Cl(OH)3 Native, green hydrouscopper oxychloride crystallizing in the orthorhombic system.
References in periodicals archive ?
Atacamite has been considered to be a primary product of supergene oxidation, both generally in the region (Chavez 2000), and specifically for this deposit (Arcuri and Brimhall 2003).
Laboratory tests on the jaws of the bloodworm Glycera dibranchiata revealed that atacamite's organization makes them durable and flexible.
Some of these cracks contained free-floating flattened stars of atacamite that had apparently been loosely attached to the rock during growth and had then fallen free.
The good leaching characteristics of RT's oxide ore, composed primarily of atacamite and chrysocolla, led to a leaching time calculation of 45 days.
The first drill hole (HDD039) has intersected a sequence of deeply weathered rocks containing a range of secondary copper minerals including native copper, atacamite and chalcocite.The large thickness and shallow depth of this secondary copper mineralisation, combined with the size of the EM anomalies indicates that large near-surface supergene copper zones could exist at the Hillside project and Rex will investigate this with further drilling in tandem with the current program focussed on the primary copper zones.
Selenite with Atacamite. Lily mine, Ica, Peru ex-collection Irv Brown
If chloride ion is present in the leachate, as is common from atacamite in Chilean ores, the use of stainless steel permanent cathodes may require significant chloride bleed to maintain the low levels required.
It consists mainly of brochantite and a basic copper chloride called atacamite, CuCl.sub.2..3Cu(OH).sub.2.
Botallackite, a rare copper chloride trimorphous with atacamite and paratacamite, was named for the Botallack mine, Cornwall, England, where the first specimens were found in 1865.
The mineralisation is impregnated with malachite and atacamite, and the secondary copper silicate, chrysocolla.
In the late 19th century the world's finest atacamite specimens were collected in South Australia and found their way into many prominent collections.
The small Lily copper prospect, about 50 km east of Pisco, yielded beautiful specimens of atacamite, malachite, chrysocolla and gypsum around 1998-2000, as well as the world's best paratacamite in dark green cuboidal crystals to 1.5 cm.