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Formula: Mn2+2(AsO4)(OH)
Anhydrous arsenate containing hydroxyl,
paramorph of
sarkinite,
olivenite group,
manganese-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 3.67 measured, 3.75 calculated
Hardness: 4
Streak: White
Colour: Apple green, pale yellow
Solubility: Readily soluble in cold hydrochloric acid
Environments:
Eveite is a very rare secondary mineral found encrusting
cavities and fractures in deposits containing
iron-manganese oxides and carbonates,
associated with hausmannite,
dolomite and calcite
(Dana).
At the type locality, Långban, Värmland, Sweden, eveite occurs in fissures in a metamorphosed
iron–manganese orebody, associated with
akrochordite,
manganohörnesite and
hausmannite
(HOM).
At Sterling Hill, New Jersey, USA, eveite occurs in a metamorphosed stratiform
zinc orebody,
associated with
willemite and sarkinite
(HOM).
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