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albite

   Also found in: Encyclopedia, Wikipedia 0.02 sec.
al·bite  (lbt)
n.
A widely distributed white feldspar, NaAlSi3O8, that is one of the common rock-forming plagioclase group.

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

al·bitic (-btk), al·biti·cal (--kl) adj.

albite [ˈælbaɪt]
n
(Earth Sciences / Minerals) a colourless, milky-white, yellow, pink, green, or black mineral of the feldspar group and plagioclase series, found in igneous sedimentary and metamorphic rocks. It is used in the manufacture of glass and ceramics. Composition: sodium aluminium silicate. Formula: NaALSi3O8. Crystal structure: triclinic
[from Latin albus white]
albitic  [ælˈbɪtɪk] adj

albite  (lbt)
A clear to milky white triclinic mineral of the plagioclase group. Albite is common in igneous rocks, especially granite, and in metamorphic rocks that formed at low temperatures. Chemical formula: NaAlSi3O8.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.albite - a widely distributed feldspar that forms rocks
oligoclase, plagioclase - any of a series of triclinic feldspars that form rocks


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The "black shale" category is typified by the Colombian deposits where emerald occurs in calcite + dolomite + pyrite [+ or -] albite veins in black shales and related rocks.
8]) that show continuous solid solution from albite to anorthite, with CaAl replacing NaSi as the series progresses.
As to the rarity of sodium in meteorites, they do contain traces of albite, a feldspar which contains sodium.
 
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