Natisite

natisite

chkalovite

vuonnemite

aegirine

Images

Formula: Na₂TiO(SiO₄)
Valence: Na₂Ti⁴⁺O(SiO₄)
Nesosilicate (insular SiO₄ groups), titanium-bearing mineral
Crystal System: Tetragonal
Specific gravity: 3.15 calculated
Hardness: 3 to 4
Colour: Yellow-green to greenish grey
Common impurities: Nb,Ta,Fe,Mn
Environments

Pegmatites

Localities

At the type locality, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia, natisite occurs in natrolite-ussingite veins that cut alkalic rocks. It forms single grains and rosette-like intergrowths, associated with chkalovite, aegirine and vuonnemite (AM 61.338-341).
Natisite from Murmansk Oblast - Image

Back to Minerals