Group name for three very closely associated minerals: Orthoclase, Sanidine, and Microcline. These three feldspar minerals have actually equal properties that are physical. They are all composed associated with the elements which can be same however their crystal structure differs. Its sometimes impossible to tell apart one of these minerals from another without x-ray analysis. As a result of difficulty of determining the classification that is exact every one of these three minerals may be called “Potassium Feldspar” without further classification. Sanidine and Microcline are wrongly classified as a number of Orthoclase in many reference guides, when, in fact, they are separate minerals.
The mineral Anorthoclase is usually also classified with the potassium feldspars.
Synonyms for potassium feldspar include: