Pretulite
Pretulite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Sc(PO₄).
It crystallizes in the tetragonal crystal system (space group I4_1/amd). It is a member of the Zircon structural group.
Key properties: Mohs hardness 5; specific gravity 3.71; White streak; Adamantine luster; optically uniaxial.
IMA symbol Ptu, IMA status: approved, named in 1996.
Rare in lazulite-quartz veins in phyllite-mica schist.
It is found associated with Lazulite, muscovite, clinochlore, fluorapatite, rutile, chlorapatite, paragonite, augelite, wardite, hydroxylherderite, goyazite, florencite-(Ce).
The name refers to the Pretulalpe, Austria, on which the species was first discovered.
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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