Potassium feldspar

Potassium feldspar refers to a number of minerals in the feldspar group, and containing potassium:

  • Orthoclase (endmember formula KAlSi3O8), an important tectosilicate mineral that forms igneous rock
  • Microcline, chemically the same as orthoclase, but with a different crystalline structure
  • Sanidine, the high-temperature form of potassium feldspar (K,Na)(Si,Al)4O8
  • Adularia, a more ordered low-temperature variety of orthoclase or partially disordered microcline
  • Amazonite (sometimes called "Amazon stone"), a green variety of microcline

This page was last updated at 2019-11-15 06:51 UTC. Update now. View original page.

All our content comes from Wikipedia and under the Creative Commons Attribution-ShareAlike License.


If mathematical, chemical, physical and other formulas are not displayed correctly on this page, please useFirefox or Safari