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Labunstovite-(Fe) - N'orkpakhk Mt, Khibiny Massif, Murmansk Oblast, Russia (#:MINS9072)

Reddish-orange sprays of labuntsovite-Fe in matrix up to 1,0 cm long from N'orkpakhk Mountain, Murmansk Oblast, Russia. This locality produces some of the world's largest labuntsovite crystals. This sample is photographed in the Italian mineralogical magazine year 1998 vol. 2 pag. 10

Formula :
Na₄K₄(Ba,K)₂Fe²⁺(Ti,Nb)₈Z(Si₄O₁₂)₄(O,OH)8·10H₂O
System: monoclinic Hardness:6 Rarity:rare
Strunz id:VIII/E.7-100 - 8 : Silicates
Name origin: Named after the Russian mineralogists Aleksander Nikolaevich Labuntsov and Ekaterina Eutiikkieva Labuntsov-Kostyleva.