Phosphoellenbergerite
Phosphoellenbergerite is an IMA-recognized mineral species in the phosphate class, with the chemical formula (Mg, )₂Mg₁₂(PO₄,PO₃OH)₆(PO₃OH,CO₃)₂(OH)₆.
It crystallizes in the hexagonal crystal system (space group P6_3mc). It is a member of the Ellenbergerite structural group.
Key properties: Mohs hardness 4–4.5; specific gravity 3.1–3.29; Vitreous to subresinous luster; optically biaxial.
IMA symbol Pell, IMA status: approved, named in 1994.
An alteration product of triphylite in zoned complex granite pegmatites.
It is found associated with Ludlamite, vivianite, huréaulite, lithiophilite, siderite.
The name refers to PHOSPHOrus and iron, FERRum, in the composition.
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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