Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso


  • Daniele L. Pinti
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_1582-3



Thermonatrite is an evaporite mineral with the chemical formula Na2CO3 H2O (orthorhombic crystal system). It is often found in association with halite (NaCl), trona (Na3(CO3)(HCO3) · 2H2O), and natron (Na2CO3 · 10H2O) in evaporitic deposits of alkaline lakes formed in arid climates (soda lakes). It can also form as an exhalative product of fumaroles or from alteration of natrite. Detection of thermonatrite on Mars or other planetary surfaces could be an indication that alkaline or hypersaline lakes had formed in the past under reducing and dry environments.

See Also


Bioorganic Chemistry Chemical Formula Sodium Carbonate Crystal System Extreme Environment 
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© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Université du Québec à MontréalGEOTOP Research Center for Geochemistry and GeodynamicsMontréalCanada