Gengenbachite
Gengenbachite is an IMA-recognized mineral species in the phosphate class, with the chemical formula KFe₃(H₂PO₄)₂(HPO₄)₄·6H₂O.
It crystallizes in the hexagonal crystal system (space group P31c).
IMA symbol Gnb, IMA status: approved, named in 2001.
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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