Labuntsovite-Fe

minerals

nepheline

natrolite

labuntsovite

Formula:
Na4K4Fe2+2Ti8O4(Si4O12)4(OH)4.10-12H2O
Cyclosilicate (ring silicate), labuntsovite group
Specific gravity: 2.94
Hardness: 5
Colour: Orange
Common impurities: Mg,Mn
Environments

Hydrothermal environments

Labuntsovite-Fe occurs in K-feldspar - natrolite - calcite veinlets in hydrothermally altered nepheline-rich rock (Webmin).

Localities

The type locality is the Kirovskii apatite mine, Kukisvumchorr Mountain, Khibiny Massif, Murmansk Oblast, Russia.

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