Plessite

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Plessite is a fine-grained mixture of the minerals kamacite and taenite found in the octahedrite iron meteorites. It occurs in gaps between the larger bands of kamacite and taenite which form Widmanstätten patterns.

Many types of plessite exist and vary in formation mechanism and morphology. Some types of plessite as named by Buchwald's "Iron Meteorites" and Massalski's "Speculations about Plessite" are:

  • acicular plessite/Type I plessite
  • black plessite/Type II plessite
  • cellular plessite/Type III plessite
  • comb plessite
  • net plessite
  • pearlitic plessite
  • spheroidized plessite

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