albitic


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al·bite

 (ăl′bīt)
n.
A colorless to white variety of feldspar that is classified both as plagioclase feldspar and alkali feldspar, contains a high proportion of sodium to calcium and potassium and is a common constituent of igneous, metamorphic, and sedimentary rocks.

[Latin albus, white; see albho- in Indo-European roots + -ite.]

al·bit′ic (-bĭt′ĭk), al·bit′i·cal (-ĭ-kəl) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Adj.1.albitic - of or related to albite feldspar
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References in periodicals archive ?
It includes massive carbonate-rich albitite, brecciated and altered host rock with albite-carbonate groundmass, and foliated albitic felsites.
The body is occupied by petrographically uniform granite composed of perthite, albitic plagioclase, quartz, and small quantities of biotite, opaque oxide and titanite.
The metamorphic mineral assemblage in most of the pelitic rocks consists of chlorite, muscovite, biotite, and albitic plagioclase whereas in the Whycocomagh Mountain area the grade is higher and garnet and andalusite are present.
Some of the crystals contain inclusions of very fine-grained tourmaline or euhedral, green-blue apatite, and some are veined by free-grained, equigranular apatite that is indicative of albitic replacement (Breaks, 1989).
The best milarite specimens were collected in the northern margin of the quarry, inside the entrance to the main edit, on the left side, in vugs in an albitic zone several meters in length.
The basement shows brittle deformation and low-grade metamorphic overprint that resulted in development of epidote chlorite albitic plagioclase and actinolite before the emplacement of the granitoids.