K2MgSi4O10

K2MgSi4O10, also known as leucite, is a tectosilicate mineral with a chemical composition of potassium, magnesium, silicon, and oxygen. It is a member of the feldspathoid group, which includes minerals that have a similar structure to feldspars but lack aluminum in their tetrahedral framework. Leucite is typically colorless or white, but it can also be found in shades of gray, yellow, or brown due to impurities. It has a hardness of 5.5 to 6 on the Mohs scale and a specific gravity ranging from 2.4 to 2.6. Leucite is commonly found in volcanic rocks, particularly in rhyolites and trachytes, and it can also occur in pegmatites and other igneous rocks. Its crystal system is monoclinic, and it often forms prismatic crystals or granular masses. Leucite is used in the production of ceramics and glass, as well as in the manufacturing of certain types of glass fibers. It is also of interest to geologists and mineralogists due to its role in the study of volcanic processes and the formation of igneous rocks.