Wiikite
Impilakhti, Pitkyaranta mining district, Republic of Karelia, Russia
3.5 x 2.0 x 1.8 cm. An very rare and old-time specimen from Russia and the Mullane Collection. Wiikite is a name applied to ill-defined mixtures and alteration products of minerals high in Nb, Ta, Ti, Si, and Y from pegmatites in the Impilakhti parish on Lake Ladoga, Russia, associated with allanite and monazite. This was formerly part of Finland ...
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