lindgrenite

{{infobox mineral | name = Lindgrenite | image = Lindgrenite-107037.jpg | imagesize = 260px | alt = | caption = Lindgrenite specimen from the San Samuel Mine of the Cachiyuyo de Llampos district, Copiapó Province, Atacama Region, Chile (field of view 4 mm) | category = Molybdate mineral | formula = Cu3(MoO4)2(OH)2 | IMAsymbol = Lgr | strunz = 7.GB.05 | dana = 48.3.1.1 | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = P21/n | unit cell = a = 5.394, b = 14.023 c = 5.608 [Å]; β = 98.5°; Z = 2 | color = Green to yellowish green | habit = Tabular to platey crystals, may be acicular, massive or crust forming | twinning = | cleavage = Perfect on {010} and {101}, poor on {100} | fracture = Micaceous | tenacity = Brittle | mohs = 4.5 | luster = Greasey | streak = Pale green | diaphaneity = Transparent | gravity = 4.2 | density = | polish = | opticalprop = Biaxial (-) | refractive = nα = 1.930 nβ = 2.002 nγ = 2.020 | birefringence = δ = 0.090 | pleochroism = | 2V = 71° (measured) | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }} Lindgrenite is an uncommon copper molybdate mineral with formula: Cu3(MoO4)2(OH)2. It occurs as tabular to platey monoclinic green to yellow green crystals.

==Discovery and occurrence==