Question:
The chemical formula of Potash Feldspar is
The chemical formula of Potash Feldspar is
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Potash feldspar is \(KAlSi_3O_8\), which is written in oxide form as \(K_2O\cdot Al_2O_3\cdot 6SiO_2\).
Updated On: May 7, 2026
- \(K_2O\,Al_2O_3\,SiO_2\)
- \(K_2O\,2Al_2O_3\,2SiO_2\)
- \(K_2O\,Al_2O_3\,4SiO_2\)
- \(K_2O\,Al_2O_3\,6SiO_2\)
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The Correct Option is D
Solution and Explanation
Potash feldspar is potassium feldspar.
Its usual mineral formula is:
\[
KAlSi_3O_8.
\]
In ceramic oxide notation, the same formula is commonly written as:
\[
K_2O\cdot Al_2O_3\cdot 6SiO_2.
\]
Let us understand this conversion.
If we take two units of:
\[
KAlSi_3O_8,
\]
we get:
\[
K_2Al_2Si_6O_{16}.
\]
Now this can be represented as:
\[
K_2O+Al_2O_3+6SiO_2.
\]
The total atoms match:
\[
K_2,\quad Al_2,\quad Si_6,\quad O_{16}.
\]
Therefore, the chemical formula of potash feldspar in oxide form is:
\[
K_2O\,Al_2O_3\,6SiO_2.
\]
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