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TWIN FORMATION [1 record]

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Alphabetical list of terms

Record 1 2015-04-17

English

Subject field(s)
  • Mineralogy
  • Gemmology
DEF

A phenomenon in the formation of crystals whereby one crystal gives rise to two coupled or overlapping crystals known as twins, most often growing from a common face. These become symmetrical and the two crystals resume a single growth pattern.

French

Domaine(s)
  • Minéralogie
  • Gemmologie
DEF

Phénomène apparaissant dans la formation des cristaux et donnant naissance au sein du même cristal à deux individus (dits macles) accolés ou imbriqués et qui présentent le plus souvent une face commune de croissance. Une opération de symétrie ramène les deux individus à un modèle de croissance unique.

CONT

Formation de macles dans un réseau cristallin.

Key term(s)
  • formation de macle

Spanish

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