| trona | <chemistry> 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. Origin: Of Egyptian or North African origin. Source: Websters Dictionary (01 Mar 1998) |
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