Wilancookite

Wilancookite is a very rare and complex beryllium phosphate with the chemical formula (Ba,K,Na)8(Ba,Li,[ ])6Be24P24O96*32H2O. Wilancookite was discovered in pegmatite of the Lavra Ponte do Piauí complex, Jequitinhonha, Minas Gerais, Brazil.

Relation to other minerals
Wilancookite is related to pahasapaite, a lithium-bearing beryllium phosphate mineral.