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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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| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Atacamite | 2V angle | Calculated: 74° | 1.00 | infobox |
| Atacamite | Birefringence | δ = 0.049 | 1.00 | infobox |
| Atacamite | Category | Halide mineral | 1.00 | infobox |
| Atacamite | Cleavage | Perfect on {010}, fair on {101} | 1.00 | infobox |
| Atacamite | Color | Bright green, dark emerald-green to blackish green | 1.00 | infobox |
| Atacamite | Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | 1.00 | infobox |
| Atacamite | Crystal habit | Slender prismatic crystals, fibrous, granular to compact, massive | 1.00 | infobox |
| Atacamite | Crystal system | Orthorhombic | 1.00 | infobox |
| Atacamite | Diaphaneity | Transparent to translucent | 1.00 | infobox |
| Atacamite | Dispersion | r < v, strong | 1.00 | infobox |
| Atacamite | Formula | Cu2Cl(OH)3 | 1.00 | infobox |
| Atacamite | Fracture | Conchoidal | 1.00 | infobox |
| Atacamite | IMA symbol | Ata | 1.00 | infobox |
| Atacamite | Luster | Adamantine to vitreous | 1.00 | infobox |
| Atacamite | Mohs scale hardness | 3–3.5 | 1.00 | infobox |
| Atacamite | Optical properties | Biaxial (−) | 1.00 | infobox |
| Atacamite | Pleochroism | X = pale green; Y = yellow-green; Z = grass-green | 1.00 | infobox |
| Atacamite | Refractive index | nα = 1.831 nβ = 1.861 nγ = 1.880 | 1.00 | infobox |
| Atacamite | Space group | Pnma | 1.00 | infobox |
| Atacamite | Specific gravity | 3.745–3.776 | 1.00 | infobox |
| Atacamite | Streak | Apple green | 1.00 | infobox |
| Atacamite | Strunz classification | 3.DA.10a | 1.00 | infobox |
| Atacamite | Tenacity | Brittle | 1.00 | infobox |
| Atacamite | Twinning | Contact and penetration with complex twinned groupings | 1.00 | infobox |
| Atacamite | Unit cell | a = 6.03, b = 9.12 c = 6.865 [Å]; Z = 4 | 1.00 | infobox |
| Atacamite | is a | copper halide mineral | 0.90 | text |
| Atacamite | is a | comparatively rare mineral | 0.90 | text |
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