| 词条 | trona |
| 释义 | trona mineral an evaporite mineral, hydrated sodium bicarbonate 【Na3H(CO3)2·2H2O】, occasionally encountered as a saline lake deposit or evaporation product and as an efflorescence on arid soil. Usually associated with natron, thermonatrite, halite, and gypsum, it occurs near Memphis, in the Lower Nile Valley; widely in the soda lakes of Africa, Armenia, Iran, and the western United States; and in the alkali deserts of Mongolia and Tibet. For detailed physical properties, see carbonate mineral (table). |
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