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Formula: Mn2+Fe3+2(PO4)2(OH)2.8H2O
Hydrated phosphate containing hydroxyl, paramorph of
stewartite,
manganese-bearing mineral
Crystal System: Monoclinic
Specific gravity: 2.463 measured, 2.51 calculated
Hardness: 3
Streak: White
Colour: Orange-yellow to amber-yellow
Environments:
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
rockbridgeite, stewartite,
strunzite and laueite
(AM 54.1312-1323).
Localities
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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