How does feldspar and quartz differ chemically?

Question

what type of silicate structure does each have and how would you distinguish between them on the basis of cleavage?

Answer 1

Feldspar is calcium, sodium and/or potassium aluminum silicate [(Ca, Na, K) Al (1-2) Si (2-3) O8]. Quartz is silicon dioxide (SiO2). Both minerals (or mineral group) are 3-D tectosilicates. Feldspars have good cleavage in three directions while quartz has no cleavage. Quartz has a concoidial (glass-like) fracture while feldspars have well-developed (planar) fractures.

Answer 2

Feldspar And Quartz

Answer 3

Because they are the most abundant minerals on the crust clay sized grains are generally smaller than quartz sand, and are largely comprised of other softer more easily weathered minerals. Feldspar and mica are common components of clay

Answer 4

If I'm remembering my geology and minerology properly there's not a significant difference in the chemical components of silica magma crystals ranging from granite to feldspar. 70-75 percent silica, roughly.

The difference is in cooling time and the silica tetrahedrons. Not the components.

edit: I told you wrong. Just did a websearch, which you should have done.

Here's a link that will provide you with what you need:

http://www.stmarys.ca/conted/webcourses/GEO/GEO99/pubigneous/composition.html

Thanks for helping to revitalize my atrophied brain by not doing your own work.