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Which mineral is commonly found in the three matamorphic rocks slate schist and gneiss?

granite


What minerals does the rock granite always contain?

Granite always contains the minerals quartz, feldspar (potassium feldspar or plagioclase feldspar), and mica (biotite or muscovite). These minerals give granite its characteristic appearance and properties.


What rock contains both amphibole and potassium feldspar?

Granite is a rock containing both amphibole and potassium feldspar.


What are two feldspars found in granite?

Granite contains plagioclase feldspar and potassium feldspar. It really depends on the composition of the magma from which it forms. If the granite has a lot of pink in it, chances are it is potassium feldspar (K-Spar). If it is dominated by white, then the feldspar is probably plag.


Is feldspar granitic?

Yes, Granite is composed mainly of quartz and potassium feldspar


The dating method that can be used in some cases on rocks as young as 50000 years old that contain feldspar mica or amphobole is?

potassium-argon


What is the most common element found in orthoclase feldspar but not in plagioclase feldspar?

The most common element found in orthoclase feldspar but not in plagioclase feldspar is potassium (K). Orthoclase is a potassium-rich feldspar, typically represented by the chemical formula KAlSi3O8. In contrast, plagioclase feldspar is a solid-solution series that primarily consists of sodium (Na) and calcium (Ca) in its composition, lacking potassium.


How feldspars differ from one another?

Feldspars are classified based on their chemical composition into three main groups: potassium feldspar, plagioclase feldspar, and sodium feldspar. Potassium feldspar includes orthoclase and microcline, while plagioclase feldspar includes albite, oligoclase, and labradorite. Sodium feldspar primarily consists of albite. Each type of feldspar has a unique mineral structure and varying ratios of sodium, potassium, and calcium ions.


Feldspar and quartz are examples of what minerals?

Feldspar and quartz are examples of silicate minerals, which are the most common group of minerals found in the Earth's crust. They are composed primarily of silicon and oxygen, along with other elements like aluminum, potassium, and sodium.


What type of cleavage does feldspar have?

Plagioclase feldspar is a non-metallic mineral. It has 2 cleavages at nearly right angles. It is also differentiated from potassium feldspar because it contains striations. Potassium feldspar has 2 cleavages at nearly right angles.


What is the ratio of potassium to aluminum to oxygen in feldspar?

Feldspar is a group of minerals that typically includes potassium feldspar (orthoclase), which has the chemical formula KAlSi3O8. In this formula, the ratio of potassium (K) to aluminum (Al) to oxygen (O) is 1:1:8 when considering the composition in terms of K, Al, and O. This means for every one potassium atom, there is one aluminum atom and eight oxygen atoms in the structure of potassium feldspar. Other feldspar varieties, such as plagioclase, have different ratios.


Potassium rich feldspar rocks?

barium