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albite
albite Min. (ˈælbaɪt) [mod. f. (by Gahn and Berzelius 1814) L. alb-us white + -ite, min. form.] 1. a. A feldspathic mineral, usually white, differing from common feldspar in containing soda instead of potash; white or soda feldspar.1843 W. Humble Dict. Geol., Albite..forms a constituent part of the ...
Oxford English Dictionary
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Albite
There are two variants of albite, which are referred to as 'low albite' and 'high albite'; the latter is also known as 'analbite'. Albite melts at .
Oftentimes, potassium can replace the sodium characteristic in albite at amounts of up to 10%.
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albitite
albitite Min. (ˈælbɪtaɪt) [f. albite + -ite1.] A form of albite (see quot. 1940). Hence albiˈtitic a.1896 H. W. Turner in Amer. Geologist XVII. 380 Some of these dikes are composed of coarsely granular albite only. Such a rock may be called an albitite. 1940 Chambers's Techn. Dict. 20/2 Albitite, a ...
Oxford English Dictionary
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Perthite
Typically, the host grain is orthoclase or microcline, and the lamellae are albite. The intergrowth forms by exsolution due to cooling of a grain of alkali feldspar with a composition intermediate between K-feldspar and albite.
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Paragonite
Paragonite is a common mineral in rocks metamorphosed under blueschist facies conditions along with other sodic minerals such as albite, jadeite and glaucophane During the transition from blueschist to greenschist facies, paragonite and glaucophane are transformed into chlorite and albite.
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Plagioclase
Sunstone is mainly oligoclase (sometimes albite) with flakes of hematite. Albite is an end member of both the alkali and plagioclase series.
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Sanidine
Sanidine and high albite constitute a solid solution series with intermediate compositions termed anorthoclase. Exsolution of an albite phase does occur; resulting cryptoperthite can best be observed in electron microprobe images.
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Eucryptite
Its typical occurrence is in lithium-rich pegmatites in association with albite, spodumene, petalite, amblygonite, lepidolite and quartz. Its name was from the Greek for well concealed, for its typical occurrence embedded in albite.
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(PDF) Albite granites in Taoxinghu ophiolite in central Qiangtang ...
代主要为奥陶纪( Z h a i e t a l , 2 0 1 0 ) , 是目 前龙 木错 双 湖 澜 沧江板块 缝合带上 年龄 最古 老的 蛇绿岩 。 不同 时代 的蛇 绿
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Subsolvus
The two types of feldspar are usually:
plagioclase: a member of the anorthite-albite series (CaAl2Si2O8-NaAlSi3O8)
alkali feldspar: a member of the orthoclase-albite In fact ternary feldspars (comprising albite+orthoclase+anorthite) are believed to have been present in the high temperature state of the rock before cooling
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Oligoclase
In chemical composition and in its crystallographic and physical characters it is intermediate between albite (NaAlSi3O8) and anorthite (CaAl2Si2O8). The albite:anorthite molar ratio of oligoclase ranges from 90:10 to 70:30.
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Maw sit sit
Maw sit sit, also known as jade-albite, is a gemstone found exclusively in northern Burma. It is composed of several different minerals, including kosmochlor (also known as ureyite), varying amounts of chromium-enriched jadeite, and albite feldspar
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Litchfieldite
Litchfieldite is composed of two varieties of feldspar (mostly albite but also some microcline), with nepheline, sodalite, cancrinite and calcite. Occurrence within zoned bodies, enveloped by amphibole bearing syenites and quartz-syenites rocks,
Broken and/or bent twin lamellae in plagioclase (albite
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Anorthoclase
Intermediate members of this series, high albite, anorthoclase and high sodium sanidine are stable at temperatures of and above. Below only very limited solution exists (less than about 5% on both the low albite and microcline ends).
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