Input interpretation
herbertsmithite (mineral)
Image
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General properties
alternate names | anarakite formula | Cu_3Zn(OH)_6Cl_2 discovery year | 1972
Basic properties
density | 3.85 g/cm^3 transparency | transparent birefringence | 0.008 luster | vitreous Mohs hardness | 3.25 tenacity | brittle streak | green magnetism | nonmagnetic color | dark green | blue green fracture | brittle molar mass | 430.3 g/mol (grams per mole)
Units
Mineral identifiers
Strunz ID | III/D.01-57 Dana ID | 10.1.2.3 IMA number | IMA2003-041
Crystallographic properties
crystal system | trigonal crystal class | -32/m unit cell volume | 569.3 Å^3 (cubic ångströms) d-spacing | 2.764 Å (ångströms) | 5.466 Å (ångströms) | 2.266 Å (ångströms) | 1.709 Å (ångströms) | 4.702 Å (ångströms) | 1.82 Å (ångströms) | 2.73 Å (ångströms) | 2.899 Å (ångströms) intensity | 100% | 55% | 36% | 18% | 14% | 13% | 13% | 11% molecules per unit cell | 3 molecules per cell refractive indices | 0 | 0 | 0 | 0 | 1.817 | 0 unit cell lengths | 6.834 Å (ångströms) | 14.08 Å (ångströms) | 14.08 Å (ångströms) unit cell angles | 90° (degrees) | 90° (degrees) | 120° (degrees)
Wikipedia summary
Herbertsmithite is a mineral with chemical structure ZnCu_3(OH)_6Cl_2. It is named after the mineralogist Herbert Smith (1872-1953) and was first found in 1972 in Chile. It is polymorphous with kapellasite and closely related to paratacamite. Herbertsmithite is generally found in and around Anarak, Iran, hence its other name, anarakite.