Usage examples (6)

• Copperas or blue stone, kainite and superphosphate are sometimes used for the same purpose.
• For over a century, rock phosphate and kainite -- a soft, readily soluble naturally occurring rock rich in potassium, magnesium and sulfur -- have been ground and used...
• To the substances used for treating brewing liquors already mentioned we may add kainite, a naturally deposited composite salt containing potassium and magnesium...
• K - 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...