Thermonatrite is a naturally occurring evaporite mineral form of sodium carbonate, Na2CO3·H2O. It was first described in 1845. Its name is from the Greek θερμός thermos, "heat", plus natron, because it may be a dehydration product of natron. Typical occurrence is in dry saline lake beds and as soil encrustations. It has been reported from volcanic fumaroles and in association with carbonatite-related veins. Common associated minerals include trona, natron and halite.
See also Nahcolite Natron Niter Potassium nitrate Shortite Soda (disambiguation) Sodium sesquicarbonate Trona
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