terms:feldspar
A group of abundant rock-forming minerals of the general formula, MAl (Al,Si)3O8 where M can be K, Na, Ca, Ba, Rb, Sr, and Fe. Most widespread of any mineral group, feldspar may constitute 60% of the earth's crust, occurring in all types of rock. When the positive ion is K+, the mineral is orthoclase; when it is Na+, it is albite; when it is Ca+2, it is anosthite.
terms/feldspar.txt · Last modified: 2023/11/22 08:40 by 127.0.0.1