Thermonatrite is a naturally occurring evaporite mineral form of sodium carbonate, Na2CO3·H2O.[ Handbook of Mineralogy][ Mindat data]
It was first described in 1845.[ Webmineral data] Its name is from the Greek θερμός thermos, "heat", plus natron, because it may be a dehydration product of natron.[
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Typical occurrence is in dry saline lake beds and as soil encrustations. It has been reported from volcano and in association with carbonatite-related veins. Common associated minerals include trona, natron and halite.[
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See also