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Examples ofsanidine
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Phenocrysts include both quartz (10-15 %) and feldspar (10 %; mostlysanidine), both measuring about 2 mm in diameter on average.
From theCambridge English Corpus
For selected ignimbrites,sanidinecrystals were taken from fresh, unaltered pumice lapilli.
From theCambridge English Corpus
Further refinement of the formation's age using radiometric dating ofsanidinecrystals has resulted in an age of 34 million years old.
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This example is from Wikipedia and may be reused under a CC BY-SA license.It commonly occurs in association with orthoclase,sanidine, labradorite, olivine, leucite, amphiboles and other pyroxenes.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Phenocrysts are sodicsanidinewith minor albite and bipyramidal quartz.
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This example is from Wikipedia and may be reused under a CC BY-SA license.This facies is named for the mineralsanidine.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Other minerals in this group include adularia, anorthoclase, buddingtonite, celsian, hyalophane, microcline, monalbite, orthoclase, andsanidine.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Due to the high temperature and rapid quenching,sanidinecan contain more sodium in its structure than the two polymorphs that equilibrated at lower temperatures.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Minerals typical of lamproites include: forsteritic olivine; high iron leucite; titanium-rich aluminium-poor phlogopite; potassium- and titanium-rich richterite; low aluminium diopside; and iron-richsanidine.
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This example is from Wikipedia and may be reused under a CC BY-SA license.This structure is very similar to that of orthoclase andsanidinebut differs in a couple of ways:: 1.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The upper part containssanidine, analcime, melanite and rock fragments.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Crystals of euhedralsanidineand marginally corroded plagioclase reach up to 500 m in size and are usually extensively altered to kaolinite.
From theCambridge English Corpus
The lower part of the formation is trachytic with abundantsanidinephenocrysts, melanite and pyroxene.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Sanidineis a polymorph of alkali feldspar stable at yet higher temperature.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Pericline twinning is a type of crystal twinning which show fine parallel twin laminae typically found in the alkali feldsparssanidine, microcline and albite.
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This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.