As nouns the difference between alkali and leucophanite

is that alkali is one of a class of caustic bases, such as soda, potash, ammonia, and lithia, whose distinguishing peculiarities are solubility in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue while leucophanite is a sorosilicate mineral that occurs in pegmatites and alkali igneous complexes as yellow, greenish or white triclinic crystals.