trona Min.
(ˈtrəʊnə)
[a. Swed. trona (1773), app. from Arabic ṭrōn, apocopate form of naṭrūn, natron, ad. Gr. νίτρον soda (Dozy).]
Native hydrous sodium carbonate, found in various places in N. Africa and America.
| 1799 Kirwan Geol. Ess. 497 The trona was not deprived of its water of crystallization. 1850 Ansted Elem. Geol., Min. etc. §371 Trona, Urao, Hydrous sesqui-carbonate of soda. 1866 Lawrence tr. Cotta's Rocks Class. (1878) 51 Trona..forms a crust on the ground on mountain slopes..in Peru. |