plagioclase

(redirected from Laboradorite)
Also found in: Thesaurus, Encyclopedia.

plagioclase

(ˈpleɪdʒɪəʊˌkleɪz)
n
(Minerals) a series of feldspar minerals consisting of a mixture of sodium and calcium aluminium silicates in triclinic crystalline form: includes albite, oligoclase, and labradorite
plagioclastic adj

pla•gi•o•clase

(ˈpleɪ dʒi əˌkleɪs)

n.
any of the feldspar minerals varying in composition from albite, NaAlSi3O8, to anorthite, CaAl2Si2O8.
[1865–70]
pla`gi•o•clas′tic (-ˈklæs tɪk) adj.

pla·gi·o·clase

(plā′jē-ə-klās′)
Any of a series of common feldspar minerals, consisting of mixtures of sodium and calcium aluminum silicates. Plagioclase is typically white, yellow, or reddish-gray, but it can also be blue to black. It is especially common in igneous rocks.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.plagioclase - any of a series of triclinic feldspars that form rocks
dacite - a grey volcanic rock containing plagioclase and quartz and other crystalline minerals
basalt - the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene
feldspar, felspar - any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium
albite, white feldspar - a widely distributed feldspar that forms rocks
anorthite - rare plagioclastic feldspar occurring in many igneous rocks
Full browser ?