A white mineral consisting of a double salt of hydrated magnesium sulphate and potassium chloride.
- An aqueous solution of kainite contains nothing except potash which, upon evaporation with platinum chloride, forms a compound which is insoluble in alcohol and the ammonium chloride wash ordinarily used in potash determinations.
- This would have meant that the evaporation stopped at the kainite crystallization point.
Mid 19th century: from German Kainit, from Greek kainos 'new, recent', because of the mineral's recent formation.
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