feldspar mining potassium
Feldspar. Feldspars are aluminosilicate minerals with varying amounts of potassium, sodium and calcium in a solid solution series. It is the most abundant mineral group, constituting ~60% of the Earth’s crust. The most common economic concentrations occur in pegmatites. Most commercial varieties are alkali feldspars, with composition between sodium and potassium end members, or at the sodic end …
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