Feldspars are important ceramic raw materials.
They are alumino-silicate minerals containing alkali or alkaline earth metals.
Potash feldspar is potassium feldspar.
It contains potassium oxide:
\[
K_2O.
\]
The common mineral name of potash feldspar is:
\[
\text{Orthoclase}.
\]
Albite is soda feldspar and contains sodium.
Anorthite is lime feldspar and contains calcium.
Dickite is a clay mineral, not potash feldspar.
Therefore, potash feldspar is also known as:
\[
\text{Orthoclase}.
\]