Hochleitnerite

hochleitnerite

zwieselite

rockbridgeite

uranophane

Images

Formula: [K(H₂O)]Mn₂(Ti₂Fe³⁺)(PO₄)₄O₂(H₂O)₁₀.4H₂O
Phosphate, paulkerrite group, manganese- and titanium- bearing mineral
Crystal System: Orthorhombic
Specific gravity: 2.40 calculated
Colour: Pale yellow
Environments

Pegmatites

Hochleitnerite is a new mineral, approved in 2023 and to date (November 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, hochleitnerite crystals occur on altered zwieselite. Minerals closely associated with hochleitnerite and zwieselite are rockbridgeite, fluorapatite, columbite and sub-micrometre rods of uranophane. Other associated minerals are quartz and a jahnsite group mineral.
Titanium-bearing minerals are very rare at Hagendorf Süd, with only biotite, ilmenite and a variety of the pyrochlore group recorded in Mindat. The most likely source of the titanium in hochleitnerite is the altered zwieselite matrix that it is in contact with. The presence of hochleitnerite crystals lining vugs formed by leaching of zwieselite suggests that hochleitnerite formed from zwieselite by dissolution–reprecipitation, and the presence of considerable H₂O in its formula indicates that this occurred at a relatively low temperature (EJM 35.4.635-643).
Hochleitnerite from the Hagendorf South Pegmatite - Image

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