plagioclase

From plagio- +‎ -clase, after German Plagioklas.

• (UK) IPA^(key): /ˈpleɪ.d͡ʒɪ.əˌkleɪz/
• (US) IPA^(key): /ˈpleɪ.d͡ʒi.əˌkleɪs/, /ˈplæd͡ʒ.i.əˌkleɪs/, /ˈpleɪ.d͡ʒi.əˌkleɪz/, /ˈplæd͡ʒ.i.əˌkleɪz/

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plagioclase (usually uncountable, plural plagioclases)

1. (mineralogy) Any of a group of aluminum silicate feldspathic minerals ranging in their ratio of calcium to sodium.
   • 2004, Richard Fortey, The Earth, Folio Society, published 2011, page 51:

     These crystals are of one of the most abundant minerals in nature – feldspar; furthermore, they are of a particular kind of feldspar rich in the element calcium, termed plagioclase.

• plagioclase on Wikipedia.Wikipedia
• albite
• oligoclase
• andesine
• labradorite
• bytownite
• anorthite
• rock
• mineral
• feldspar

• David Barthelmy (1997–2024) “Plagioclase”, in Webmineral Mineralogy Database.
• “plagioclase”, in Mindat.org‎, Hudson Institute of Mineralogy, 2000–2024.

plagioclase f (plural plagioclases)

1. plagioclase

• “plagioclase”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.