TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

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If the regions are related such that they share a common c direction, the twin plane being the old mirror plane of the monoclinic structure, the twin is termed an albite twin.  2, fiche 1, Anglais, - albite%20twin

Record number: 1, Textual support number: 2 CONT

Albite twin. The plagioclase feldspars, particularly albite ..., are frequently twinned on the albite law ... where the twin-plane and composition plane is (010). This twinning is often repeated to give a series of five lamellae, seen in the hand specimens as striations...; such twinning is usually called "polysynthetic" or "lamellar" twinning.  3, fiche 1, Anglais, - albite%20twin

Fiche 1,  Justifications,  Français

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La macle de l'albite, dite encore polysynthétique, donne en lumière polarisée une alternance de bandes claires et foncées.  1, fiche 1, Français, - macle%20de%20l%27albite

Record number: 1, Textual support number: 1 OBS

macle : Assemblage régulier de deux ou plusieurs individus cristallins de même nature. [...] Ces macles sont très fréquentes dans les minéraux (ex. gypse, quartz, pyrite, aragonite, rutile, albite, péricline, fluorite, or, etc.).  2, fiche 1, Français, - macle%20de%20l%27albite

Fiche 1,  Justifications,  Espagnol