bn:00059576n
Noun Concept
Categories: Gemstones, Articles with short description, Potassium minerals, Monoclinic minerals, Minerals in space group 12
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orthoclase  adularia  K-feldspar  K-feldspars  K-spar
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Orthoclase, or orthoclase feldspar, is an important tectosilicate mineral which forms igneous rock. Wikipedia
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. Wiktionary
Potassium aluminum silicate. Wiktionary (translation)
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