Paranatisite
Paranatisite is an IMA-recognized mineral species in the silicate class, with the chemical formula Na₂TiO(SiO₄).
It crystallizes in the orthorhombic crystal system (space group Pmma).
Key properties: Mohs hardness 5; specific gravity 3.12; White streak; Vitreous to adamantine luster; optically biaxial.
IMA symbol Pnts, IMA status: approved, named in 1990.
Found in ultra-agpaitic pegmatites in a differentiated alkalic massif.
It is found associated with Nepheline, potassic feldspar, aegirine, aenigmatite, natisite, lamprophyllite, lorenzenite, shcherbakovite, delhayelite, villiaumite, lepidomelane.
Its name comes from the Greek para, for near, and its relation to natisite.
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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