Phurcalite
2 in the gallery
Phurcalite is a uranyl phosphate mineral that forms as hydrated crystals in oxidized zones of uranium-bearing rocks. The structure accommodates uranyl groups with phosphate and calcium, yielding a mineral that can appear as elongated, prismatic crystals with a glassy to resinous lustre. Habit commonly includes prismatic to radiating aggregates, and the mineral often exhibits a pale to colorless to slightly yellow coloration depending on hydration and impurity content.
- Formula
- Ca2(UO2)3(PO4)2O2 · 7H2O
Where Phurcalite is found
Top localities
- Portugal1 specimen
About Phurcalite
Notable specimens have been reported from Portugal, where secondary uranium- and phosphate-rich environments can stabilize this species. Collectors seek Phurcalite for its delicate crystal forms and its association with other uranyl phosphates in oxidized uranium deposits, which can offer striking intergrowths and contrasting minerals in matrix. Its rarity and distinctive composition contribute to its appeal, appealing to specialists who pursue phosphates and uranyl minerals and to those who appreciate finely formed, hydration-sensitive crystals.