Mineralpedia Details for Belyankinite
Dmitry Stepanovich Belyankin is the namesake of Belyankinite as a formerly prominent mineralogist ant petrographer. The type and only locality for Belankinite is at the Medvzh’ya Berloga pegmatite in the Lovozero Massif in the Kola Peninsula in Russia. There, it occurs as inclusions “in aegirine and microcline, in nepheline syenite pegmatite in an alkalic massif, in part probably as a replacement of murmanite.” Other associated minerals include zeolites, eudialyte, lorenzenite, lamprophyllite, and titanium oxides.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/belyankinite.pdf
Belyankinite from Pegmatite #13, Tyul'bnyunuai River Valley, Lovozero Massif, Kola Peninsula, Russia
Pinkish to light tan platy crystals which are pseudomorphous after Murmanite with an Aegerine matrix. This is the best known locality of Belyankinite in the world.
Belyankinite from Medvzh'ya Berloga pegmatite, Tyulbnyunuai River valley, Lovozero Massif, Kola Peninsula, Russia
Cream colored crystals which as replacement after Murmanite. Belyankinite is found in the block zone of the pegmatite and represents the richest deposit in Lovozero.
Belyankinite from Flora Mt., Lovozero Massif, Kola Peninsula, Russia
Tannish brown thick platy crystals occupying most of matrix.