Specific gravity: 2.54
Colour: Grey-white to colourless
Solubility: Soluble in water
Plutonic igneous environments
At the Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Quebec, Canada, natrite occurs in sodalite xenoliths associated with an intrusive alkalic gabbro-syenite complex (HOM).
There are three co-type localities,
Rasvumchorr Mt, Khibiny Massif,
Olenii Ruchei, the carbonatite Stock in the vicinity of Tul'ilukht Bay, Khibiny Massif, Murmansk Oblast, Russia , and
Karnasurt Mountain, Lovozersky District,
all in Murmansk Oblast, Russia.
Here natrite occurs in deep workings and drill cores in mines in evaporite rocks. In air it rapidly hydrates to thermonatrite (Dana). Associated minerals include thermonatrite, vinogradovite, shortite, pirssonite, gaylussite, nacaphite, natrosilite, villiaumite, neighborite, rasvumite, lomonosovite, pectolite, sodalite and fluorcaphite (AM 68.281-282, HOM).
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