Udinaite
Udinaite is an IMA-recognized mineral species in the vanadate class, with the chemical formula NaMg₄(VO₄)₃.
It crystallizes in the tetragonal crystal system (space group I-42d).
Key properties: Mohs hardness 3.5; specific gravity 3.613; White streak; Vitreous luster; optically uniaxial.
IMA symbol Udn, IMA status: approved, named in 2018.
Forms as a sublimate at an active volcanic fumarole.
It is found associated with Arsenudinaite, anhydrite, diopside, hematite, schäferite, berzeliite, svabite, calciojohillerite, tilasite, reznitskyite, ludwigite.
The name refers to the Udina volcano situated near the discovery locality.
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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