American Heritage® Dictionary of the English Language, Fourth Edition
- n. A natural vitreous gray or white mineral, Na2CO3·NaHCO3·2H2O, used as a source of sodium compounds.
Century Dictionary and Cyclopedia
- n. The native soda of Egypt, a hydrous carbonate of sodium, Na2CO3.HNaCO3 + 2H2O. It also occurs at Borax Lake, San Bernardino county, California, in Churchill county, Nevada, and elsewhere. Urao, from a lake in Venezuela, is the same compound.
- n. mineralogy A saline evaporite, consisting of mixture of sodium carbonate and sodium bicarbonate, Na3HCO3CO3·2H2O.
GNU Webster's 1913
- n. (Chem. & Min.) A native double salt, consisting of a combination of neutral and acid sodium carbonate, Na2CO3.2HNaCO3.2H2O, occurring as a white crystalline fibrous deposit from certain soda brine springs and lakes; -- called also
urao, and by the ancients nitrum.
- From the Swedish trona or from the Spanish trona, both derived from the Arabic اطرون (atrūn), which derives from the Arabic نطرون (natrūn); from the Ancient Greek νίτρον (nitron), from the Ancient Egyptian ntry. (Wiktionary)
- Swedish, probably from Arabic dialectal ṭrōn, variant of Arabic naṭrūn, natron; see natron. (American Heritage® Dictionary of the English Language, Fourth Edition)
“In the beginning of winter the trona is the thickest and best, but in the spring it disappears entirely.”
“And so we control emissions of sulfur dioxide in other ways, principally by using the trona, which is chemically very similar to sodium bicarbonate.”
“Trona is a desperate little town one valley over from Death Valley - a lifeless, dust-blown sulfate mining town, named for trisodium hydrogendicarbonate dihydrate, or trona, which is what they pull out of the ground around there.”
“The Wyoming Basin also has extensive coal deposits along with areas of trona, bentonite, clay, and uranium mining.”
“Oil and gas exploration, along with mining (strip mining for coal and hard-rock mining for trona and other industrial minerals), have the potential to cause considerable disturbance, wildlife displacement, and environmental pollution. 6,000 to 11,000 new oil and gas wells could be sunk in southwestern Wyoming in the next 20 years.”
“This deposit consists of thick, extensive beds of trona and thin trona beds inter-bedded with salt (halite).”
“The largest trona deposit in the world is in the Green River Basin of Wyoming.”
“It is made both by the processing of the minerals trona (Na3H (CO3) 2. 2H2O) and nahcolite (NaHCO3), and by processing sodium carbonate-rich waters (called brines).”
“This is known as the Solvay process, and was the main source of soda ash until the Wyoming trona deposits were discovered.”
“The Wyoming Basin also has extensive coal deposits along with areas of trona, bentonite, clay, and uranium mining. 18a.”
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List of minerals, elements, group names and geochemistry terms encountered in the science of mineralogy. I've chosen to avoid capital letters in most examples, though a great many mineral names hon...
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