Varulite
Varulite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Na₂Mn(MnFe³⁺)(PO₄)₃.
It is a member of the Alluaudite structural group.
Key properties: Mohs hardness 5; specific gravity 3.5–3.6; Vitreous luster; optically biaxial.
IMA symbol Vr, IMA status: approved, named in 1937.
Found in complex granite pegmatites, either as a primary mineral or an alteration product of triphylite–lithiophilite; as nodules in shale.
It is found associated with Alluaudite.
The name refers to its initially noted occurrence in the Varuträsk pegmatite, Sweden.
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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