Natrotantite
Natrotantite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Na₂Ta₄O₁₁.
It crystallizes in the hexagonal crystal system (space group R-3c).
Key properties: Adamantine luster.
IMA symbol Ntan, IMA status: approved, named in 1980.
Found in albite units of granite pegmatites.
It is found associated with Simpsonite, alumotantite, microlite, sosedkoite.
The name refers to sodium, NATRium, and TANTalum in the composition.
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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