orthoclase

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English[edit]

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Orthoclase

Etymology[edit]

ortho- +‎ -clase.

Noun[edit]

orthoclase (countable and uncountable, plural orthoclases)

  1. (mineralogy) Potassium aluminum silicate, KAlSi3O8, a common feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase is the main feldspar of pegmatite occurrences, where it is most commonly flesh-colored. Orthoclase is used in the ceramic and glass industries and as a decorative gravel.

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