Double salt and Primary solid solution

Double salt noun - A solution of two simple salts that forms a single substance on crystallization.

Primary solid solution and double salt are semantically related. In some cases you can use "Primary solid solution" instead a noun phrase "Double salt".

Primary solid solution noun - A homogeneous solid that can exist over a range of component chemicals; a constituent of alloys that is formed when atoms of an element are incorporated into the crystals of a metal.

Double salt and primary solid solution are semantically related. Sometimes you can replace phrase "Double salt" with "Primary solid solution", this phrases are similar.