A mixture of the minerals sylvite and halite, mined as a source of potash.
- ‘It occurs naturally as the mineral sylvite and in combination with sodium chloride as sylvinite.’
- ‘The amount of water that must be evaporated is 6.5-7.5 kg per kg of KCl in the form of sylvinite.’
- ‘The potash ore in the Sallent mine is a reddish mineral known as sylvinite, a form of potassium chloride.’
- ‘The most important source of potash in the United States is a mine near Carlsbad, New Mexico, that produces sylvinite.’
- ‘The Senate's decision to cut the federal royalty rate will not affect the state's royalty rate of 2 percent for sylvinite and 5 percent for langbeinite.’
- ‘The areal outline and estimated mass of the sylvinite beds were based on examination of drill hole data and review of interpreted vintage seismic maps.’
- ‘The current processing route for sylvinite involves milling of the ore in a saturated leach liquor followed by conventional flotation.’
Late 19th century: from sylvine + -ite.