Bright green, dark emerald-green to blackish green
Crystal habit
Slender prismatic crystals, fibrous, granular to compact, massive
Twinning
Contact and penetration with complex twinned groupings
Cleavage
Perfect on {010}, fair on {101}
Fracture
Conchoidal
Tenacity
Brittle
Mohs scale hardness
3–3.5
Luster
Adamantine to vitreous
Streak
Apple green
Diaphaneity
Transparent to translucent
Specific gravity
3.745–3.776
Optical properties
Biaxial (−)
Refractive index
nα = 1.831 nβ = 1.861 nγ = 1.880
Birefringence
δ = 0.049
Pleochroism
X = pale green; Y = yellow-green; Z = grass-green
2V angle
Calculated: 74°
Dispersion
r < v, strong
References
[2][3][4][5]
Atacamite is a copper halide mineral: a copper(II) chloride hydroxide with formula Cu2Cl(OH)3. It was first described for deposits in the Atacama Desert of Chile in 1802 by Dmitri de Gallitzin.[2] The Atacama Desert is also the namesake of the mineral.
Atacamite is a copper halide mineral: a copper(II) chloride hydroxide with formula Cu2Cl(OH)3. It was first described for deposits in the Atacama Desert...
minerals in four polymorphic crystal forms: atacamite, paratacamite, clinoatacamite, and botallackite. Atacamite is orthorhombic, paratacamite is rhombohedral...
pollution or sea winds) typically favour the formation of brochantite or atacamite. Malachite can also be produced synthetically, in which case it is referred...
water-insoluble. It occurs associated with native silver, cerussite, iodargyrite, atacamite, malachite, jarosite and various iron–manganese oxides. It was first described...
Minerals associated with boleite include pseudoboleite, cumengeite, atacamite, anglesite, cerussite, phosgenite and gypsum at the type locality in Boleo...
(approximately 44 wt%) and malachite, with notable traces of atacamite, a copper chloride. Proposing that atacamite formation occurred during occasional Nile inundations...
copper and copper-chlorine resinate; the crystalline material might be atacamite or some other copper-chlorine compound. Analysis of the red-brown paint...
(crystals are generally separated and have different lengths). aenigmatite, atacamite, epidote, pyrophyllite, stibnite Reticulated Crystals forming triangular...
environment altering chalcocite. Associated minerals include chalcocite, atacamite, native copper, diopside, grossular, and vesuvianite. It was first described...
Botallack Mine, St Just in Penwith, Cornwall. It is polymorphous with atacamite, paratacamite and clinoatacamite [Wikidata]. Botallackite crystallises...
minerals may also have polyatomic anions. Examples include the following: Atacamite Cu2Cl(OH)3 Avogadrite (K,Cs)BF Bararite (β)(NH4)2SiF6 Bischofite MgCl2·6H2O...
internally green but turn reddish as they oxidize. Hibbingite is part of the atacamite family of minerals. Hibbingite is named after the town of Hibbing, Minnesota...
presence of water or in humid climates and will convert to botallackite and atacamite through the process of hydrolysis. Belloite is only stable in desert regions...
structure is made up of copper, carbonate and hydroxide ions. The mineral atacamite is an example of a basic chloride. It has the formula, Cu2Cl(OH)3. In...
hydroxide mineral with the formula MnCuCl(OH)3. Iyoite is a new member of the atacamite group, and it an analogue of botallackite characterized in manganese and...
atacamite. It is found in Chile, Botallack Mine in Cornwall, Broken Hill, Australia, and in Italy in Capo Calamita on the island of Elba. Atacamite Warr...
the formation of a protective patina composed of antlerite Cu3(OH)4SO4, atacamite Cu4(OH)6Cl2, brochantite Cu4(OH)6SO4, cuprous oxide Cu2O, and tenorite...
Apuanite Apu Astrophyllite Ast Aegirine Aeg Aluminium Al Aqualite Aq Atacamite Ata Aegirine-Augite Aeg-Aug Aluminoceladonite Acel Aradite Ara Atelestite...
azurite and malachite, the silicate chrysocolla, and sulfates such as atacamite. In some cases, sulfide ores are allowed to degrade to oxides. Such ores...
products migrate. In presence of chloride ions, the precipitated material is atacamite; its semiconductive properties lead to increased current leakage, deteriorated...
Associated minerals include bismutite, mica, jarosite, alunite, cerussite, atacamite, connellite. Occurrences include the type locality at Jackals Water, SW...
The chalconatronite found on the censer formed over cuprite and some atacamite crystals, which are associated minerals. Chalconatronite was also found...
direction hydrogen bonds between NH3 and Cl atoms Ammineite coexists with atacamite, darapskite, halite and salammoniac. Ammineite is supposed to be a result...
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