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[troh-nuh] /ˈtroʊ nə/
a monoclinic mineral, grayish or yellowish hydrous sodium carbonate and bicarbonate, Na 2 CO 3 ⋅NaHCO 3 ⋅2H 2 , occurring in dried or partly evaporated lake basins.
1790-1800; < Spanish < dialectal Arabic ṭrōn, aphetic variant of naṭrūn natron Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for trona
  • trona was mined using conventional room and pillar mining.
  • The mineral trona is a naturally occurring mixture of sodium carbonate, sodium bicarbonate, and water.
  • trona is a mineral found in deposits left behind by the evaporation of ancient water bodies.
  • trona provided a cost-effective source of carbonates, which helped reduce scaling in the processing equipment.
British Dictionary definitions for trona


a greyish mineral that consists of hydrated sodium carbonate and occurs in salt deposits. Formula: Na2CO3NaHCO3.2H2O
Word Origin
C18: from Swedish, probably from Arabic natrūnnatron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for trona

an evaporite mineral, hydrated sodium bicarbonate [Na3H(CO3)22H2O], occasionally encountered as a saline lake deposit or evaporation product and as an efflorescence on arid soil. Usually associated with natron, thermonatrite, halite, and gypsum, it occurs near Memphis, in the Lower Nile Valley; widely in the soda lakes of Africa, Armenia, Iran, and the western United States; and in the alkali deserts of Mongolia and Tibet. For detailed physical properties, see carbonate mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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