Hydrated phosphate containing hydroxyl, paramorph of stewartite
Specific gravity: 2.463
Colour: Orange-yellow to amber-yellow
Pseudolaueite is a late stage mineral in granite pegmatites, occurring as
incrustations and replacements of stewartite crystals (Webmin, Mindat). It is
often an alteration product of triphylite and associated with
strunzite and laueite
At the type locality, the Hagendorf South Pegmatite, Waidhaus, Neustadt an der Waldnaab District, Upper Palatinate, Bavaria, Germany, pseudolaueite occurs as incrustations and replacements of stewartite crystals in a complex zoned granite pegmatite, associated with stewartite, mitridatite, laueite, jahnsite, strunzite and triphylite (HOM, Mindat). Pseudolaueite crystals may show a core of stewartite (AM 41.815).
At the Emmons pegmatite, Greenwood, Oxford county, Maine, USA, pseudolauite is associated with fairfieldite. The Emmons pegmatite is an example of a highly evolved boron-lithium-cesium-tantalum enriched pegmatite (R&M 94.6.513).
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