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单词 allotropy
释义

allotropy

/əˈlɒtrəpi /
noun [mass noun] Chemistry
The existence of two or more different physical forms of a chemical element.With the exception of nitrogen, all group V elements show allotropy....
  • An example of allotropy is carbon, which can exist as diamond, graphite, and amorphous carbon.
  • The best known example for allotropy is iron.

Derivatives

allotropic

/aləˈtrɒpɪk / adjective ...
  • Synthetic diamonds are produced by forcing an allotropic transition from graphite to diamond under conditions of extremely high temperature and mechanical pressure over a period of several days or weeks.
  • Manganese exists in four allotropic forms, the most common of which is stable to a temperature of about 1,300°F.
  • Graphite is one of the four allotropic forms of carbon; the other three are amorphous carbon, diamond, and fullerene.

Origin

Mid 19th century: from Greek allotropos 'of another form', from allo- 'other' + tropos 'manner' (from trepein 'to turn').

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更新时间:2025/3/20 18:16:45