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Formula: Fe3+O(OH)
Hydroxide, paramorph of goethite
and feroxyhyte
Crystal System: Orthorhombic
Specific gravity: 4.05 to 4.13 measured, 3.96 calculated
Hardness: 5
Streak: Orange
Colour: Deep red, red-brown
Common impurities: Mn
Environments:
Lepidocrocite is common in iron ore deposits as a weathering or oxidation product of other iron-bearing minerals,
as a precipitate from ground water and in marine manganese nodules.
Associated minerals include goethite and
pyrite
(HOM).
Localities
The type locality is Zlaté Hory, Jeseník District, Olomouc Region, Czech Republic.
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