Legrandite
Image: <a href="//commons.wikimedia.org/wiki/User:Archaeodontosaurus" title="User:Archaeodontosaurus">Didier Descouens</a> (CC BY-SA 3.0)
Mineral NameLegrandite
Chemical FormulaZn2(AsO4)(OH)·H2O
Mohs Hardness4.5
Crystal Systemmonoclinic
Lustervitreous
Streak Colorwhite
Cleavageperfect on {010}
Fractureconchoidal
Specific Gravity3.98
Colorsyellow, orange-yellow, brownish-yellow
Transparencytransparent
Type LocalityOjuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexico
Mineral Grouparsenates
Usescollector
Associated Mineralsadamite, limonite, scorodite, mimetite, smithsonite, hemimorphite
Rarityuncommon
Description
The image displays vibrant yellow, prismatic crystals of Legrandite, with one prominent crystal standing upright and others forming a cluster on a textured matrix.
Geological Context
Legrandite is a secondary mineral found in the oxidized zones of arsenic-bearing zinc ore deposits, typically forming in cavities and fractures within the host rock.
