Chemical Formula Of Minerals In Granite

The main chemical propositions of the granite are sio 2 65 70 a little of al 2 o 3 cao mgo and fe 2 o 3 thus the granite is acid rock.

Chemical formula of minerals in granite.

Granite because it is composed of various and different quantities of minerals does not have a specific formula. Granite is a plutonic igneous rock. Strictly speaking granite is an. These minerals make up more than 80 of the rock.

Other minerals can give granite its great variety of colors and textures. However granite is composed mainly of the minerals potassium feldspar quartz. 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. 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.

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. Another alkali feldspar is anorthoclase whose formula is na k alsi3o8. 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.

Other common minerals include mica muscovite and biotite and hornblende see amphibole.