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A method for the quick determination of the approximate amount and composition of the nickeliferous iron in Meteorites ; and its application to seventeen meteoric stones1

Published online by Cambridge University Press:  14 March 2018

G. T. Prior
G. T. Prior*
Affiliation:
Mineral Department of the British Museum
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Extract

In the classification proposed by the author in a previous paper meteorites are divided into five groups according to the ratio of iron to nickel in the nickeliferous iron they contain. In the case of the meteoric irons such a classification, as shown by Farrington's list of analyses, is a natural one, since the structure of the irons, as revealed by etching, varies with the amount of nickel they contain. Thus Group 1, in which the metal is poor ill nickel, with a ratio of Fe to Ni of 13 upwards, includes nickel-poor ataxites, hexahedrites, and Coarsest and coarse octahedrites ; Group 2, in which Fe : Ni =8-13, the rest of the octahedrites from medium to finest ; Group 8, in which Fe : Ni = 5-8, nickel-rich ataxites; Group 4, in which Fe: Ni = 2-5, ataxites still richer in nickel; while Group 5 may include the doubtful Oktibbeha meteorite in which the ratio of iron to nickel is even less than one.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 18 , Issue 87 , November 1919 , pp. 349 - 353
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1919

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Footnotes

Communicated by permission of the Trustees of the British Museum.

References

page 349 note 2 Prior, G. T., Mineralogical Magazine, 1916 , vol. xviii, p. 42 Google Scholar.

page 349 note 3 Farrington, O. C., 'Analyses of Iron Meteorites Compiled and Classified.' Field Museum of Natural Itistory, Chicago, 1907, Publication 120, Geol. Series, vol. iii, No. 5Google Scholar.

page 350 note 1 Flight, W., Proc. R. Soc. London, 1881-2, p. 84 ; 'A chapter in the history of meteorites,' 1887, p. 222Google Scholar.

page 351 note 1 Prior, G. T., Mineralogical Magazine, 1918, vol. xvii, p. 24 Google Scholar.

page 352 note 1 e.g. The addition of sufficient acetic acid, after the neutralization of the solution with sodium carbonate and the addition of sodium acetate.

page 352 note 2 Prior, G. T., Mineralogical Magazine, 1916, vol. xviii, p. 33 Google Scholar.

page 352 note 3 The numbers calculated from the older analyses are taken from the previous paper (loc. cit., pp. 31-35).