Malinkoite
Malinkoite is an IMA-recognized mineral species in the silicate class, with the chemical formula NaBSiO₄.
It crystallizes in the hexagonal crystal system (space group P6_3). It is a member of the Beryllonite structural group.
Key properties: Mohs hardness 7; specific gravity 2.85–2.9; White streak; Vitreous, spherulites are pearly or silky luster; optically uniaxial.
IMA symbol Mlk, IMA status: approved, named in 2000.
Found in a cavity in the ussingite-rich core of a hyperagpaitic pegmatite.
It is found associated with Ussingite, chkalovite, nordite, gerasimovskite, neptunite.
The mineral was named to honor Russian specialist in boron minerals, Svetlana V. Malinko (b. 1927).
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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