Albite: The plagioclase feldspar mineral Albite ...
Albite belongs to the Plagioclase Feldspar group, an isomorphous solid solution is one end member, containing sodium and no calcium. The other end member, Anorthite, contains calcium and no intermediary members are Oligoclase, Andesine, Labradorite, and and Andesine are considered by some to be a variety of Albite rather then a separate mineral.