Also found in: Thesaurus, Encyclopedia.


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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.albitic - of or related to albite feldspar
Mentioned in ?
References in periodicals archive ?
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 felsic host rocks invariably consist of secondary quartz, sericite, biotite, chlorite and albitic plagioclase, and minor amounts of K-feldspar, tourmaline, calcite and epidote.