from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A saline evaporite, consisting of sodium carbonate, with the chemical formula Na2CO3·H2O.
from The Century Dictionary and Cyclopedia
- n. Hydrous sodium carbonate (Na2CO3 + H2O), occurring chiefly as an effiorescence in connection with saline lakes.
Sorry, no etymologies found.
Sodium carbonate has three known forms of hydrates: sodium carbonate decahydrate (natron), sodium carbonate heptahydrate (not known in mineral form) and sodium carbonate monohydrate (mineral thermonatrite).