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Microstructure of Fe-Ni Meteorites

Fe – Ni Meteorites

  • Ni ranges from 4.3 to 34% (few >20%)
  • Cobalt present, 0.4 –1%
  • Sulfur <0.6%
  • P <0.3%
  • C <0.2%
  • Small amounts of other elements

Fe – Ni Meteorites

Three Basic Types:

  • Hexahedrites–Single Crystals, Ni is usually 5.2 –5.8%
  • Octahedrites–Long Ferrite (Kamacite) grains, usually 5 –10% Ni
  • Ataxites–No Gross Macrostructure, usually 15-18% Ni
  • Anomalous types


The articles and presentations that can be down-loaded from this web site are based upon work done by GFV while employed at Bethlehem Steel (1967-1983), Carpenter Technology (1983-1996), Buehler Ltd. (1996-2009) and Struers (2009-Present) and from the authors consulting work for companies such as, Latrobe Steel, Scot Forge, etc., and from his litigation work. GFV's bylined articles appearing in various issues of the ASM Handbook series have been listed here courtesy of ASM International, Materials Park, Ohio.