Nahcolite

minerals

gaylussite

burkeite

thermonatrite

Images
Formula: NaH(CO3) acid carbonate
Specific gravity: 2.21
Hardness: 2½
Streak: White
Colour: Colourless, white, grey, buff
Solubility: Readily soluble in water forming an alkaline solution that gives off carbon dioxide when heated. Also soluble in glycerine.
Environments

Evaporite Deposits

Nahcolite is a lacustrine (lake) evaporite mineral.

In old Roman conduit at Naples, Italy, nahcolite occurs admixed with trona and thermonatrite as an efflorescence.

pseudomorphs after gaylussite, and as alteration rims around thermonatrite.

At Searles Lake, California, nahcolite occurs in thin beds associated with gaylussite, thénardite, burkeite, northupite, borax and halite.

Back to Minerals