double salt

1. 1.

   a solution of two simple salts that forms a single substance on crystallization

   Broadersaltsolid solution

   NarroweralumRochelle saltParis green

Questions about double salt

What does double salt mean?

double salt means "a solution of two simple salts that forms a single substance on crystallization".

Is double salt a common word?

double salt is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.