Meteorites and thermodynamic equilibrium in f.c.c. iron-nickel alloys (25 - 50%Ni).

Mossbauer spectroscopy and X-ray investigations show that taenite (f.c.c. iron-nickel alloy) in meteorites generally has decomposed into an ordered phase FeNi with the L10 structure and a disordered f.c.c. iron-nickel alloy containing less than 25% of Ni. The two phases have the same bravais lattice, i.e., they form a pseudo monocrystal. The decomposition is discussed in terms of Fe-Ni phase diagram.

[1]  David B. Williams,et al.  Analytical electron microscopy study of the plessite structure in four IIICD iron meteorites , 1979 .

[2]  J. M. Knudsen,et al.  Iron–nickel 50–50 superstructure in the Santa Catharina meteorite , 1979, Nature.

[3]  J. M. Knudsen,et al.  Structure of taenite in two iron meteorites , 1978, Nature.

[4]  J. M. Knudsen,et al.  Mössbauer Effect Studies of Taenite Lamellae of an Iron Meteorite Cape York (III. A) , 1978 .

[5]  David B. Williams,et al.  Analytical electron microscopy study of the plessite structure in the Carlton iron meteorite , 1977 .

[6]  J. F. Petersen,et al.  Mössbauer spectroscopy of an ordered phase (superstructure) of FeNi in an iron meteorite , 1977 .

[7]  L. Billard,et al.  On the dissymmetry of mossbauer spectra in iron-nickel alloys☆ , 1975 .

[8]  V. Buchwald.  Handbook of iron meteorites , 1975 .

[9]  V. Buchwald.  Handbook of iron meteorites, their history, distribution, composition, and structure , 1975 .

[10]  E. Scott.  The nature of dark-etching rims in meteoritic taenite , 1973 .

[11]  Y. Gros,et al.  Etude par effet mössbauer de l'ordre dans un alliage Fe-Ni 50-50 irradié par des neutrons ou des électrons , 1970 .

[12]  J. M. Short,et al.  The iron meteorites, their thermal history and parent bodies. , 1967 .

[13]  J. Goldstein,et al.  Distribution of germanium in the metallic phases of some iron meteorites , 1967 .

[14]  Joseph I. Goldstein,et al.  The growth of the Widmanstätten pattern in metallic meteorites , 1965 .

[15]  L. Néel,et al.  Magnetic Properties of an Iron—Nickel Single Crystal Ordered by Neutron Bombardment , 1964 .

[16]  S. Higuchi,et al.  The Phase Transformation of Iron Rich Iron-Nickel Alloy in Fine Particles , 1962 .

[17]  Y. Bandō.  The formation of superstructure of Fe3Ni in fine particles , 1961 .

[18]  W. Nichiporuk.  Variations in the content of nickel, gallium, germanium, cobalt, copper and chromium in the kamacite and taenite phases of iron meteorites , 1958 .