Organovaite-Mn
Organovaite-Mn is an IMA-recognized mineral species in the silicate class, with the chemical formula K₂MnNb₄(Si₄O₁₂)₂O₄·5-7H₂O.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Labuntsovite structural group.
Key properties: Mohs hardness 5; specific gravity 2.88; White streak; Vitreous luster; optically biaxial.
IMA symbol Org-Mn, IMA status: approved, named in 2000.
Found in alkaline pegmatite.
It is found associated with Microcline, albite, aegirine, arfvedsonite, eudialyte, sodalite, natrolite, elpidite, cristobalite, steenstrupine-(Ce), rhabdophane-(Ce).
The mineral was named to honor crystallographer Natalia Ivanovna Organova (b. 1929).
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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