Composition of the plagioclase minerals

Composition of the plagioclase minerals

Composition of the plagioclase minerals
mineral composition (in percent)
albite 100–90 Ab
    0–10 An
oligoclase   90–70 Ab
  10–30 An
andesine   70–50 Ab
  30–50 An
labradorite   50–30 Ab
  50–70 An
bytownite   30–10 Ab
  70–90 An
anorthite   10–0 Ab
  90–100 An
See as table:

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Universalium. 2010.

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  • plagioclase — plagioclastic /play jee euh klas tik/, adj. /play jee euh klays /, n. any of the feldspar minerals varying in composition from acidic albite, NaAlSi3O8, to basic anorthite, CaAl2Si2O8, found in most igneous rocks: shows twinning striations on… …   Universalium

  • Plagioclase — A photomicrograph of a plagioclase crystal under cross polarized light. The plagioclase crystal shows a distinct banding effect called a Polysynthetic twinning. (unknown scale) General Category …   Wikipedia

  • plagioclase — pla•gi•o•clase [[t]ˈpleɪ dʒi əˌkleɪs[/t]] n. mir any of the feldspar minerals varying in composition from albite, NaAlSi3O8, to anorthite, CaAl2Si2O8 • Etymology: 1865–70 pla gi•o•clas′tic ˈklæs tɪk adj …   From formal English to slang

  • plagioclase — /ˈpleɪdʒioʊˌkleɪz / (say playjeeoh.klayz), / ˌkleɪs/ (say .klays) noun any of the felspar minerals varying in composition from NaAlSi3O8 to CaAl2Si2O8, important constituents of many igneous rocks. {Greek plagio(s) oblique + klasis fracture} …  

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