Phosphoferrite

phosphoferrite

vivianite

triploidite

ludlamite

Images

Formula: Fe2+3(PO4)2.3H2O
Hydrated normal phosphate, phosphoferrite group, forms a series with reddingite
Specific gravity: 3 to 3.2
Hardness: 3 to 3½
Streak: White
Colour: Colourless, pale green, reddish brown (altered), colourless to faintly tinted green in transmitted light
Solubility: Soluble in acids
Environments

Pegmatites

Phosphoferrite occurs as an alteration product of triphylite in zoned complex granite pegmatites. Associated minerals include ludlamite, vivianite, hureaulite, lithiophilite and siderite (HOM).

Localities

There are two co-type localities, the Hühnerkobel Mine, Rabenstein, Zwiesel, Regen District, Lower Bavaria, Bavaria, Germany and the Hagendorf North Pegmatite, Hagendorf, Waidhaus, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany. Here phosphoferrite occurs in a pegmatite associated with vivianite, triploidite and ludlamite (Mindat).

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