Wiktionary
sylvinite
n. (context mineralogy English) sylvite
Wikipedia
Sylvinite
Sylvinite is the most important ore for the production of potash in North America and Russia. It is a mechanical mixture of sylvite (KCl, or potassium chloride) and halite (NaCl, or sodium chloride). Most Canadian operations mine sylvinite with proportions of about 31% KCl and 66% NaCl with the balance being insoluble clays, anhydrite and in some locations carnallite.
Usage examples of "sylvinite".
There the rich Ronneberg deposit, containing for the most part 24 per cent of sylvinite and barely 14 per cent of carnallitite, was worked to a width of as much as sixty-five feet.
Only when intensive degradation of new materials is required do we make use of a hot sylvinite solution to which magnesium bromide is added.