leucite

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lösit
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A mineral of silica-poor igneous, plutonic and volcanic rocks. Chemically, Leucite is a potassium feldspar with insufficient silica to satisfy the chemical bonds. Because of the unfilled bonds, Leucite weathers rapidly and can only be seen as inclusions in freshly broken rock
It is a silicate of alumina and potash
It is found in the volcanic rocks of Italy, especially at Vesuvius
One of the most common feldspathoid minerals, potassium aluminosilicate (KAlSi2O6). It occurs only in igneous rocks, particularly potassium-rich, silica-poor, recent lavas. Some important localities include Rome, Italy; Uganda; and Wyoming's Leucite Hills. Leucite is used as a fertilizer in Italy (because of its high potassium content) and as a source of commercial alum
A leucoplast
A mineral having a glassy fracture, occurring in translucent trapezohedral crystals
amphigene
feldspathoid
leucite
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