Category Phosphate Crystal system Cubic crystal system | Space group I23 | |
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Formula
(repeating unit) (Ba,K,Na)8(Ba,Li,[])6Be24P24O96•32H2O Crystal class Tetartoidal (23)
H-M symbol: (23) Unit cell a = 13.54 Å (approximated) | ||
Wilancookite is a very rare and complex beryllium phosphate with the 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.
References
Wilancookite Wikipedia(Text) CC BY-SA