Trona (sodium sesquicarbonate dihydrate trisodium and hydrogendicarbonate dihydrate; is a non-marine evaporite mineral. In the US, it gets mined as the main source of sodium carbonate, replacing the Solvay process, employed in most part of world for production of sodium carbonate.
Na3 (CO3) (HCO3)• 2H2O
Derivation of Name
The word "Trona" comes to English as per either Spanish (Trona) or Swedish (Trona). Both the likely sources have the same meaning as in English. Both are derived from the Arabic trōn, which successively is derived from the Arabic word Natron, as also Hebrew נטרן (Natruna), coming from olden Greek νιτρον (Nitron), derived eventually from early Egyptian ntry (or nitry).
Trona has been realized in magmatic environments also. Markl and Baumgartner demonstrate that trona may be created by autometasomatic effect of late-magmatic melts or liquids (or mixtures of supercritical fluid-melt), with previous crystallized rocks inside the same plutonic complex, or by large-scale vapor unmixing towards the very concluding stages of magmatism.
Trona is hardly ever utilized as gemstones.
Trona is sited at Searle’s Lake and Owens Lake, California; the Makgadikgadi Pans in Botswana, the Green River Formation of Utah and Wyoming; and in the Nile Valley in Egypt. The Trona close to Green River, Wyoming is the biggest recognized deposit and it occurs as layered evaporite deposits at depths of 800 - 1,600 feet underneath the ground, where it got deposited in a lake during the Paleogene Period.
Trona is a sort of mineral containing many sodium carbonate forms as non-marine evaporite deposits. Other known sodium carbonates are: Gaylussite, Pirssonite, Nahcolite, Natron, Northupite and Thermonatrite. Trona is perhaps the most frequent and famous of these minerals.
It comes in gray, white, colorless, yellowish or pale brown color.
Mohs scale hardness