| 词汇 | sanidine |
| 释义 | BETA Examples of sanidinesanidine isn’t in the Cambridge Dictionary yet. You can help! Phenocrysts include both quartz (10-15 %) and feldspar (10 %; mostly sanidine), both measuring about 2 mm in diameter on average. For selected ignimbrites, sanidine crystals were taken from fresh, unaltered pumice lapilli. Further refinement of the formation's age using radiometric dating of sanidine crystals has resulted in an age of 34 million years old. From Wikipedia 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. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Phenocrysts are sodic sanidine with minor albite and bipyramidal quartz. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This facies is named for the mineral sanidine. From Wikipedia 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, and sanidine. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Due to the high temperature and rapid quenching, sanidine can contain more sodium in its structure than the two polymorphs that equilibrated at lower temperatures. From Wikipedia 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-rich sanidine. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This structure is very similar to that of orthoclase and sanidine but differs in a couple of ways:: 1. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The upper part contains sanidine, analcime, melanite and rock fragments. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Crystals of euhedral sanidine and marginally corroded plagioclase reach up to 500 m in size and are usually extensively altered to kaolinite. The lower part of the formation is trachytic with abundant sanidine phenocrysts, melanite and pyroxene. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Sanidine is a polymorph of alkali feldspar stable at yet higher temperature. From Wikipedia 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 feldspars sanidine, microcline and albite. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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