Pahasapaite
Pahasapaite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Li₈(Ca,Li,K)₁₀Be₂₄(PO₄)₂₄·38H₂O.
It crystallizes in the cubic crystal system (space group I23).
Key properties: Mohs hardness 4.5; specific gravity 2.28; White streak; Vitreous luster.
IMA symbol Pah, IMA status: approved, named in 1983.
A rare late-stage mineral in seams in fractured beryl crystals, within the inner-intermediate zone of a complex granite pegmatite.
It is found associated with Englishite, roscherite, eosphorite–childrenite, tiptopite, montgomeryite.
The name comes from Pahasapa, the Lakota Sioux word for the Black Hills, in allusion to the type locality.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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