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ANTIPERTITA [1 record]

Record 1 2010-12-30

English

Subject field(s)
  • Mineralogy
DEF

A variety of alkali feldspar consisting of parallel or subparallel intergrowths in which the sodium-rich phase (albite, oligoclase, or andesine) appears to be the host from which the potassium-rich phase (usually orthoclase) exsolved.

OBS

antiperthite: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • anti-perthite

French

Domaine(s)
  • Minéralogie
DEF

Feldspath complexe à structure de perthite, mais où les constituants sont inversés par rapport à ce qu'on observe dans les perthites.

CONT

Pour l'antiperthite, c'est le plagioclase qui forme le fond et contient des filaments, de fines lamelles ou des micro-inclusions géométriques orientées de feldspath potassique.

OBS

antiperthite : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Campo(s) temático(s)
  • Mineralogía
DEF

Plagioclasa cuyo feldespato sódico contiene laminillas de ortosa.

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