Trona

minerals

thermonatrite

nahcolite

natron

Images
Formula: Na3(HCO3)(CO3).2H2O
Acid carbonate
Specific gravity: 2.14
Hardness: 2
Streak: White
Colour: Colourless, grey, yellow-white
Solubility: Soluble in water; effervesces in acids
Environments:

Evaporite Deposits (typical)

Trona occurs in lacustrine (lakes) evaporite deposits, and also as an efflorescence on soils in arid regions. It is commonly associated with natron, thermonatrite, nahcolite, halite, glauberite, thénardite, mirabilite and gypsum.

Localities

At Searles Lake, California, trona occurs with borax, hanksite, thénardite and others.

In Green River oil shales, Wyoming, trona occurs with shortite, northupite, bradleyite and pirssonite (Dana).

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