A common rock-forming mineral occurring typically as white or pink crystals. It is a potassium-rich alkali feldspar and is used in ceramics and glass-making.
More example sentences
- Feldspars are added as orthoclase in order to reduce the devitrification of the glass.
- Of these, alkali feldspar, particularly orthoclase, is the most common.
- Associated minerals are white orthoclase, milky quartz, and muscovite.
Definition of orthoclase in:
- The US English dictionary