Phosphogartrellite
Phosphogartrellite is an IMA-recognized mineral species in the phosphate class, with the chemical formula PbCuFe³⁺(PO₄)₂(OH,H₂O)₂.
It crystallizes in the triclinic crystal system (space group P-1). It is a member of the Helmutwinklerite structural group.
Key properties: Mohs hardness 4.5; specific gravity 5.05; Yellow streak; Vitreous to adamantine luster; optically biaxial.
IMA symbol Pgtl, IMA status: approved, named in 1996.
A rare secondary mineral, probably produced through oxidation of earlier sulfides in silicified barite veins.
It is found associated with Hentschelite, pyromorphite, malachite, cuprite.
As the phosphate analog of gartrellite.
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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