Parasymplesite

minerals

kottigite

vivianite

symplesite

Images
Formula: Fe2+3(AsO4)2.8H2O
Hydrated normal arsenate, vivianite group, paramorph of symplesite, forms a series with köttigite
Specific gravity: 3.01
Hardness: 2
Streak: Blue-white
Colour: Light green to leek green, may be greenish black, also deep blue
Solubility: Soluble in acids (Dana)
Environments

Hydrothermal environments

Parasymplesite is a rare secondary arsenate in the oxidised zone of some arsenic-rich hydrothermal base-metal mineral deposits (HOM), associated with goethite, pharmacosiderite, quartz, scorodite, symplesite, köttigite, pharmacosiderite, arsenopyrite, löllingite, erythrite and annabergite (HOM, Dana, Mindat).

Near Schneeberg, Saxony, Germany, parasymplesite occurs with roselite (Dana).

At the type locality, the Kiura mine, Saiki City, Oita, Japan, parasymplesite occurs in oxidised polymetallic veins (Mindat).

At Baia Sprie, Romania, parasymplesite occurs with quartz in cavities in chert (Dana).

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