Thermonatrite is a naturally occurring evaporite mineral form of sodium carbonate, Na2CO3·H2O.
[3] 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.
This article about a specific carbonate mineral is a stub.