Double salt

Double salts are salts containing more than one cation or anion. They form when more than one salt is dissolved in a liquid and when together they crystallize in a regular pattern. A well-known double salt is alum containing two cations, sodium and aluminum and a sulphate anion. Other examples are potassium sodium tartrate and bromlite.

Doppelsalze 複塩 Dubbelzout Двойные соли