kainite

Noun
  1. A white mineral consisting of magnesium sulphate and potassium chloride;
    A source of potassium salts;
    Used as a fertilizer (synset 114703113)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    substance holonym: atomic number 19, k, potassium - a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite

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