Feldspar Group

The feldspars are aluminum silicates (AlSi₃O₈) that contain potassium, sodium, and/or calcium. (Rare members containing other elements also exist.) A silicon (Si) atom may be replaced by the atom of a different metal, thus there are less than three silicon atoms in some feldspars.
Some minerals of this group are often wrongly classified as varieties of other minerals in this group.
Feldspar is the most abundant group of minerals on the earth.

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• Back to Tectosilicates list (all)
• Back to Tectosilicates list (subdivided)