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Formula: Mn2+2Mn3+(AsO4)(OH)4
Anhydrous arsenate containing hydroxyl,
manganese-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 3.87 measured, 3.73 calculated
Hardness: 4½
Colour: Green-brown, dark green; Brownish yellow-green in transmitted light.
Solubility: Soluble in hydrochloric acid
Environments:
Metamorphic environments
Hydrothermal environments
Flinkite is an extremely rare arsenate.
At the type locality, the Harstigen Mine, Filipstad, Värmland, Sweden, flinkite occurs in veinlets
in a metamorphosed manganese-iron ore body of the Långban type, as feathery aggregates
of crystals implanted upon caryopilite,
baryte, and other arsenates
(AM 52:1603-1613).
Associated minerals include sarkinite,
brandtite, caryopilite,
nadorite, native lead, manganoan
calcite
and baryte
(Mindat, HOM).
At Franklin, New Jersey, USA, flinkite occurs in a metamorphosed stratiform
zinc orebody,
associated with
cahnite, jarosewichite,
franklinite, hausmannite and
andradite
(HOM ).
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