feldspar
IPA: fˈɛɫdspɑr
noun
- (mineralogy) Any of a large group of rock-forming minerals that, together, make up about 60% of the earth's outer crust. The feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium. Feldspars are the principal constituents of igneous and plutonic rocks.
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Examples of "feldspar" in Sentences
- Feldspar, you are completely correct.
- Feldspar asked for a personal opinion.
- Albite is a plagioclase feldspar mineral.
- Feldspar is restricted to the ground mass.
- Moonstone is feldspar with a pearly and opalescent lustre.
- Alternate names are alkali feldspar and potassium feldspar.
- Alternate names are 'alkali feldspar' and 'potassium feldspar'.
- In the batholiths, there are quartz feldspar porphyry and dolerite dykes.
- The hill is composed of feldspar porphyry, its summit of compacted feldspar.
- Barium feldspars form as the result of the replacement of potassium feldspar.
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