double salt

noun, Chemistry
1.
a salt that crystallizes as a single substance but ionizes as two distinct salts when dissolved, as carnallite, KMgCl 3 ⋅6H 2 O.
Origin
1840-50
British Dictionary definitions for double salt

double salt

noun
1.
a solid solution of two simple salts formed by crystallizing a solution of the two salts Compare complex salt
double salt in Science
double salt
A salt that crystallizes from an aqueous solution of a mixture of two different ions. The mineral dolomite (CaMg(CO3)2), for example, is a double salt that crystallizes from a solution containing both calcium and magnesium ions. Double salts exist only as solids. Compare complex salt, simple salt.