TERMIUM Plus®

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ALBITE-TWINNED PLAGIOCLASE [1 record]

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Record 1 2011-12-22

English

Subject field(s)
  • Mineralogy
OBS

Plagioclase twins mechanically on the albite law. Twinning is most likely to occur when the resolved shear stress ... is at a maximum. Only those crystals oriented in the stress field to approximately meet this condition will twin. Thus, in a rock containing mechanically twinned grains, the principal stress directions affecting the rock may be approximated by measuring the twin elements of these grains.

OBS

albite-twinned plagioclase: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Minéralogie
CONT

Entre les masses biotitiques apparaissent des agrégats de plagioclases maclés albite et d'aspect trouble, auxquels s'associent de très rares cristaux de quartz et de minuscules grains d'opaques.

Spanish

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