carnallite

Noun
  1. A white or reddish mineral consisting of hydrous chlorides of potassium and magnesium;
    Used as a fertilizer and as a source of potassium and magnesium (synset 114693574)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    substance holonym:
    • atomic number 12, magnesium, mg - a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine)
    • 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
    • atomic number 37, rb, rubidium - a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite

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