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FIGURE WIDMANSTATTEN [1 record]

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Record 1 1986-12-03

English

Subject field(s)
  • Planets
  • Astronomy
DEF

A triangular pattern observed on polished and etched surfaces of iron meteorites (octahedrites), composed of parallel bands or plates of kamacite bordered by taenite and intersecting one another in two, three or four directions.

French

Domaine(s)
  • Planètes
  • Astronomie
CONT

L'un des caractères les plus fréquents des météorites ferrifères est la structure de Widmanstätten [...], structure que l'on rencontre également dans les enclaves de fer natif des basaltes des plateaux d'Ovifak (Groenland). C'est une structure lamelleuse que l'on fait apparaître en attaquant une surface polie par l'acide azotique étendu. Elle est formée par l'intrication de lamelles de composition différente.

Spanish

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