Pleysteinite

pleysteinite

zweiselite

rockbridgeite

nordgauite

Images

Formula: [(H₂O)_0.5K_0.5]₂Mn₂Al₃(PO₄)₄F₂.4H₂O
Hydrated phosphate, paulkerrite group
Crystal System:
Specific gravity: 2.34 calculated
Colour: Colourless
Environments

Pegmatites

Pleysteinite is a new mineral, approved in 2022 and to date (January 2024) reported only from the type locality.

Localities

At the type locality, the Hagendorf South Pegmatite, Hagendorf, Waidhaus, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany, pleysteinite occurs as isolated and small aggregates of colourless, stubby prisms that are typically 10 to 30 µm wide and up to 100 µm long, in altered zwieselite. In addition to zwieselite associated minerals also include rockbridgeite, pyrite, nordgauite, fluellite and minerals of the columbite-(Fe) - columbite-(Mn) series (Mindat).

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