Category:Trona

Tro"na, n. Etym: [of egyptian or north african origin.] (chem. & Min.)

Defn: 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.