Poellmannite
Poellmannite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Ca₆Al₃(OH)₁₈[Na(H₂O)₆](SO₄)₂·6H₂O.
It crystallizes in the hexagonal crystal system (space group R-3). It is a member of the Hydrotalcite structural group.
IMA symbol Poe, IMA status: approved, named in 2022.
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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