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Formula: Al2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9
Hydrated uranyl phosphate,
phosphuranylite group
Crystal System: Monoclinic
Specific gravity: 3.383 calculated
Hardness: 3
Streak: Yellow-white
Colour: Lemon-yellow
Luminescence: Phuralumite is not fluorescent in UV, however, it is often associated with nearly identical
looking minerals which are variously fluorescent in UV, usually in various shades of yellow to greenish yellow
(Mindat)
RADIOACTIVE
Environments
Pegmatites
Hydrothermal environments
Localities
At the type locality, the Kobokobo pegmatite, Shabunda Territory, South Kivu, DR Congo, phuralumite is a
rare secondary mineral in the oxidised
uraniferous zone of a complex
beryl-columbite
granite
pegmatite, where it occurs as lemon-yellow
prismatic crystals, to 0.5 mm in length.
Associated minerals include meta-autunite,
phosphuranylite,
threadgoldite and upalite
(HOM, Mindat).
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