Mélonjosephite
Mélonjosephite is an IMA-recognized mineral species in the phosphate class, with the chemical formula CaFe²⁺Fe³⁺(PO₄)₂(OH).
It crystallizes in the orthorhombic crystal system (space group Pbam).
Key properties: Mohs hardness 5; specific gravity 3.65; Vitreous to resinous luster; optically biaxial.
IMA symbol Mjo, IMA status: approved, named in 1973.
Replacing an alluaudite group mineral in a complex granite pegmatite (Angarf-Sud pegmatite, Morocco).
It is found associated with Triphylite.
The mineral was named to honor Professor Joseph Mélon (1898–1991), Institute of Mineralogy, University of Liège, Liège, Belgium.
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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