单词 | widmanstättian |
释义 | Widmanstättianadj. attributive. Now rare. Designating a pattern or figure exhibited by some meteorites when a cross section is exposed to acid, consisting of thin interleaving bands of iron-nickel alloys. Also: designating a similar pattern consisting of ferrite bands that sometimes occurs in steel and alloys of iron. Cf. Widmanstätten n. ΘΚΠ the world > matter > chemistry > crystallography (general) > crystallization > [adjective] > Widmanstatten bands Widmanstättian1839 Widmanstätten1881 1839 Amer. Jrnl. Sci. 37 97 The cause of the Widmanstättian figures is, that the foreign metals are not equally blended, but separate into imperfectly formed crystalline series. 1883 Philos. Trans. (Royal Soc.) 173 889 It is the constituent of nickel-iron which forms the fine lines constituting the Wiedmannstättian figures, and not schreibersite, as usually stated in writings on the etched figures of meteoric iron. 1927 Proc. Amer. Philos. Soc. 66 267 The Widmanstättian type of structure so frequently observed in alloys of iron with other elements. 1999 H. Y. McSween Meteorites & their Parent Planets (ed. 2) vi. 209 Where metal is more abundant, it has a well-developed Widmanstaettian pattern. This entry has been updated (OED Third Edition, June 2017; most recently modified version published online December 2021). < adj.1839 |
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