Hanksite

sulphate

Searles lake

Formula: KNa22(SO4)9(CO3)2Cl Anhydrous compound sulphate containing halide
Specific gravity: 2.562
Hardness: 3 to 3½
Streak: White
Colour: Colourless to grey, yellow or almost black; colourless in transmitted light
Solubility: Readily soluble in water, effervesces weakly in dilute acids
Environments:

Sedimentary environments

Hanksite occurs in lacustrine (lake) evaporite deposits. It is abundant at Searles Lake, California, USA, associated with halite, borax, trona and aphthitalite.

Back to Minerals