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Atacamite

Atacamite is a copper halide mineral: a copper(II) chloride hydroxide with formula Cu2Cl(OH)3. It was first described from deposits in the Atacama Desert of Chile in 1802 by Dmitri Alekseyevich Golitsyn. The Atacama Desert is also the namesake of the mineral.

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2V angle
Calculated: 74°
Birefringence
δ = 0.049
Category
Halide mineral
Cleavage
Perfect on {010}, fair on {101}
Color
Bright green, dark emerald-green to blackish green
Crystal class
Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)

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Overview

Occurrence

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Map overview Semantic statistics

Atacamite

Nodes41
Edges40
Triples55
Avg. degree1.95
Density0.04878
Components1

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Atacamite

Top relations

related to Occurrence · 8
Atacamite → Arizona, Australia, Chile, China, Czech Republic, It, Russia, The
related to Biomineral · 7
Atacamite → Chile, ChileAtacamite, Gunson, Harvard Museum, Mt, Natural HistoryAtacamite, South Australia
related to Synthetic occurrence · 7
Atacamite → Antikythera, Eurasia, Liberty, Persia, Russia, Statue, The
related to External links · 6
Atacamite → Amethyst Galleries' Mineral Gallery, Archived, October, Retrieved, September, The
is a · 2
Atacamite → comparatively rare mineral, copper halide mineral
2V angle · 1
Atacamite → Calculated: 74°
Birefringence · 1
Atacamite → δ = 0.049
Category · 1
Atacamite → Halide mineral
Cleavage · 1
Atacamite → Perfect on {010}, fair on {101}
Color · 1
Atacamite → Bright green, dark emerald-green to blackish green

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Important terminology

mineral copper australia deposits chile also atacama desert halide formula cu2cl oh references biomineral russia bronze mt gunson south alteration

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Atacamite2V angleCalculated: 74°1.00infobox
AtacamiteBirefringenceδ = 0.0491.00infobox
AtacamiteCategoryHalide mineral1.00infobox
AtacamiteCleavagePerfect on {010}, fair on {101}1.00infobox
AtacamiteColorBright green, dark emerald-green to blackish green1.00infobox
AtacamiteCrystal classDipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)1.00infobox
AtacamiteCrystal habitSlender prismatic crystals, fibrous, granular to compact, massive1.00infobox
AtacamiteCrystal systemOrthorhombic1.00infobox
AtacamiteDiaphaneityTransparent to translucent1.00infobox
AtacamiteDispersionr < v, strong1.00infobox
AtacamiteFormulaCu2Cl(OH)31.00infobox
AtacamiteFractureConchoidal1.00infobox
AtacamiteIMA symbolAta1.00infobox
AtacamiteLusterAdamantine to vitreous1.00infobox
AtacamiteMohs scale hardness3–3.51.00infobox
AtacamiteOptical propertiesBiaxial (−)1.00infobox
AtacamitePleochroismX = pale green; Y = yellow-green; Z = grass-green1.00infobox
AtacamiteRefractive indexnα = 1.831 nβ = 1.861 nγ = 1.8801.00infobox
AtacamiteSpace groupPnma1.00infobox
AtacamiteSpecific gravity3.745–3.7761.00infobox
AtacamiteStreakApple green1.00infobox
AtacamiteStrunz classification3.DA.10a1.00infobox
AtacamiteTenacityBrittle1.00infobox
AtacamiteTwinningContact and penetration with complex twinned groupings1.00infobox
AtacamiteUnit cella = 6.03, b = 9.12 c = 6.865 [Å]; Z = 41.00infobox
Atacamiteis acopper halide mineral0.90text
Atacamiteis acomparatively rare mineral0.90text

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