Mineral
Sabugalita
HAl(UO₂)₄(PO₄)₄ · 16H₂O · Fosfatos (Uranilo)
It is the uncommon "aluminium cousin" of autunite. It belongs to the same group A(UO₂)₂(TO₄)₂ · 8–16H₂O, where A may be Cu, Ca, Ba, Ni, Mn, Fe or the (HAl) pair, and T corresponds to P or As. It retains the micaceous layer structure, but it is a special case because it is not a simple substitution of calcium by aluminium: aluminium enters accompanied by hydrogen to balance the charge.
Etymology
From the type locality: Sabugal, Guarda, Portugal.