Wiktionary
n. (context inorganic chemistry English) An inorganic compound that consists of a fixed proportion of two salts, often sharing either a common cation or common anion
Usage examples of "mixed salt".
The old method mixed salt water (sodium chloride) with carbon dioxide from heated limestone (calcium carbonate), and ammonia from our coke ovens.
Then it was that the little flat flask, full of mixed salt and pepper, rewarded me for the long carrying of it.
Once when I was a kid, I mixed salt in the sugar bowl, and at dinner that night--and I was the only member of the family who took sugar in tea--I spooned a gob of it into my cup.
The sun was near-blinding even when one did not look toward it, and she felt dizzy with the heavy sickishness of breathing the mixed salt and sweet smells.