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potash feldspar
noun
- any of the feldspar minerals having the composition KAlSi 3 O 8 , as orthoclase.
potash feldspar
- Potassium feldspar.
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Word History and Origins
Origin of potash feldspar1
First recorded in 1860–65
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Example Sentences
Orthoclase, often called common or potash- feldspar.
From Project Gutenberg
The granite which composes the magnificent bare pinnacles and the steep western flank of the Portillo chain, is of a brick-red colour, coarsely crystallised, and composed of orthitic or potash feldspar, quartz, and imperfect mica in small quantity, sometimes passing into chlorite.
From Project Gutenberg
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