Piece of the mineral manganbelyankinite . Discovered in Lovozero, Kola Peninsula, Russia. Exhibit of the "Earth and Man" Museum in Sofia, Bulgaria. — Photo: Vassia Atanassova - Spiritia · CC BY-SA 3.0
Manganbelyankinite
Manganbelyankinite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Mn²⁺(Ti,Nb)₅O₁₂·9H₂O.
It crystallizes in the amorphous crystal system.
Key properties: Mohs hardness 2–3; specific gravity 2.54; Resinous luster; optically biaxial.
IMA symbol Mbyn, IMA status: questionable, named in 1957.
Found in pegmatite.
The name refers to its MANGANese content, and relation to belyankinite.
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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