Pirssonite

carbonate

trona

Formula: Na2Ca(CO3)2.2H2O hydrated normal carbonate
Specific gravity: 2.352
Hardness: 3 to 3½
Streak: White
Colour: Colourless, white, greyish
Solubility: Soluble in cold dilute acids with effervescence
Environments

Sedimentary environments

Pirssonite is an evaporite mineral.

Localities

Namibia

At the Otjiwalundo Salt Pan, Kunene Region, pirssonite occurs with trona and thénardite.

USA

At Borax Lake, California, pirssonite occurs with northupite, tychite and gaylussite.

Near Green River, Wyoming, it has been recovered from drill cores with shortite, bradleyite, northupite, gaylussite and trona.

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