Outstanding yellow crystals of the very rare uranium mineral phuralumite from the TL and only confirmed locality worldwide: Kobokobo Pegmatite, Mwenga, South Kivu, DR Congo. Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Phuralumite
Phuralumite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Al₂[(UO₂)₃(PO₄)₂O(OH)](OH)₃(H₂O)₉.
It crystallizes in the monoclinic crystal system (space group P2_1/a).
Key properties: Mohs hardness 3; specific gravity 3.5; optically biaxial.
IMA symbol Pha, IMA status: approved, named in 1978.
A rare secondary mineral found in the oxidized uraniferous zone of a complex granite pegmatite.
It is found associated with Meta-autunite, phosphuranylite, threadgoldite, upalite.
The name refers to PHosphorus, URanium, and ALUMinum in the composition.