Chemical Formula Of Minerals In Granite

These minerals make up more than 80 of the rock.

Chemical formula of minerals in granite. Granite is a plutonic igneous rock. The chemical formula for quartz is sio2. Granite is the typical type of plutonic rocks it consists of feldspar quartz a few dark colored mineral sand mica. Granites can be predominantly white pink or gray in color depending on their mineralogy the word granite comes from the latin granum a grain in reference to the coarse grained structure of such a completely crystalline rock.

Quartz content can range from 10 60 while the feldspar content typically ranges from 65 95 and biotite content is around 10 15 in most granite. Another alkali feldspar is anorthoclase whose formula is na k alsi3o8. Strictly speaking granite is an. Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture.

The resulting granite will likely have been made primarily from quartz different feldspars and biotite however it can also have a variety of other minerals and oxides present. These other minerals include mica amphibole hornblende biotite and muscovite. Other minerals can give granite its great variety of colors and textures. Other common minerals include mica muscovite and biotite and hornblende see amphibole.

The chemical composition of granite is typically 70 77 silica 11 13 alumina 3 5 potassium oxide 3 5 soda 1 lime 2 3 total iron and less than 1 magnesia and titania.