Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-25T16:03:32.188Z Has data issue: false hasContentIssue false
  • English
  • Français

Methods for the chemical analysis of meteorites. I. Siderites

Published online by Cambridge University Press:  14 March 2018

A. A. Moss ,
M. H. Hey  and
D. I. Bothwell
A. A. Moss
Affiliation:
Department of Mineralogy, British Museum
M. H. Hey
Affiliation:
Department of Mineralogy, British Museum
D. I. Bothwell
Affiliation:
Department of Mineralogy, British Museum
Get access Rights & Permissions [Opens in a new window]

Summary

Simple chemical procedures (colorimetric and gravimetric) for the determination of Co, Cr, Cu, Ga, Ni, P, and S in an iron meteorite or in the separated metallic phase of a pallasite are described; the minimum size of sample is discussed. A procedure for the quantitative removal of the metallic, sulphide, and phosphide phases from a stone or siderolite is described, and is applicable to the quantitative isolation of silicate and oxide inclusions from siderites (other than some very high in nickel).

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 32 , Issue 253 , June 1961 , pp. 802 - 816
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1961

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Page 802 Note 1 Fairbairn, H. W. et al., U.S. Geol. Surv. Bull. no. 980, 1951 Google Scholar; Fairbairn, H. W. and Schairer, J. F., Amer. Min., 1952, vol. 37, p. 744 Google Scholar [M.A. 12-33]; Fairbairn, H. W., Geochimica Acta, 1953, vol. 4, p. 143 CrossRefGoogle Scholar [M.A. 12-264]; Smales, A. A., Mapper, D., and Wood, A. J., Analyst, 1957, vol. 82, p. 75 CrossRefGoogle Scholar [M.A. 13-250] ; Goldich, S. S. and Oslund, E. H., Bull. Geol. Soc. Amer., 1956, vol. 67, p. 811 CrossRefGoogle Scholar [M.A. 13-467]; Smales, A. A., Geochimica Acta, 1955, vol. 8, p. 300 CrossRefGoogle Scholar [M.A. 14-43] ; Riley, J. P., Anal. Chim. Acta, 1958, vol. 19, p. 413 CrossRefGoogle Scholar [M.A. 14-87]; Chirnside, R. C., Journ. Soc. Glass Technol., 1959, vol. 43, p. 5 Google Scholar T [M.A. 14-383]; Riley, J. P. and Williams, H. P., Mikrochim. Acta, 1959, p. 804 CrossRefGoogle Scholar [M.A. 14-455].

Page 802 Note 2 Wahl, W., Geochimica Acta, 1950, vol. 1, p. 28 CrossRefGoogle Scholar [M.A. 11-261]; W. Wahl and H. B. Wiik, ibid., p. 123 [M.A. 11-437].

Page 803 Note 1 E. B. Sandell, Colorimetric Determination of Traces of Metals, 3rd edn, New York and London, 1959.

Page 803 Note 2 Wahl, W., Geochimica Acta, 1952, vol. 2, p. 91 CrossRefGoogle Scholar [M.A. 11-526].

Page 803 Note 3 See, for example, the entries in Prior, G. T., Catalogue of Meteorites, 2nd edn, London, 1953, under Cape York Google Scholar, Otumpa, Mount Joy, Glorieta Mountain, Prambanan, Cratheús, and Rodeo. On the other hand, the widely differing analyses for the different masses of Babb's Mill and of Staunton may indicate distinct falls.

Page 803 Note 4 Game, P. M., Min. Mag., 1957, vol. 31, p. 656.CrossRefGoogle Scholar

Page 805 Note 1 That is, a mixture of equal parts conc. HCl, sp. gr. 1.18, and water.

Page 805 Note 2 If larger samples than 1 g. are necessary, the amount of acid and final bulk of solution A should be increased proportionally. Similarly the scale of operation on the other two samples, and the bulk of solutions B and C, must be increased proportionally. But the size of the aliquots for the several determinations need not be increased.

Page 807 Note 1 If nitrogen is not available carbon dioxide may be used.

Page 807 Note 2 After Cluley, H. J., Analyst, 1951, vol. 76, p. 523.CrossRefGoogle Scholar

Page 808 Note 1 It is usually convenient to make the preliminary estimates by reference to a standard curve, but the actual determination should be made against standard solutions prepared at the same time as the unknown. The same applies in the other colorimetric procedures described below.

Page 808 Note 2 A spectrophotometer is the most suitable instrument for this and the other determinations described below, but a filter-type absorptiometer may be used.

Page 809 Note 1 Culkin, F. and Riley, J. P., Analyst, 1958, vol. 83, p. 208.CrossRefGoogle Scholar

Page 810 Note 1 The proportion of dyestuff in the Rhodamine B bought from different suppliers of chemicals varies, and in order to obtain the maximum extraction of the complex it may be necessary to double or even quadruple the concentration prescribed below; preliminary experiments with 0.5%, 1%, and 2% solutions and standard gallium solution should be made with each new batch of dyestuff to ascertain the appropriate strength.

Page 810 Note 2 Swift, E. H., Journ. Amer. Chem. Soc., 1936, vol. 58, p. 2573.CrossRefGoogle Scholar

Page 813 Note 1 Hey, M. H., Min. Mag., 1932, vol. 23, p. 48;Google Scholar ef. idem, ibid., p. 12; Kokta, J., Coll. Czech. Chem. Comm., 1937, vol. 9, p. 471 CrossRefGoogle Scholar [M.A. 7-173].

Page 814 Note 1 Dennis, L. M. and Bridgeman, J. A., Journ. Amer. Chem. Soc., 1918, vol. 40, p. 1534.CrossRefGoogle Scholar

Page 814 Note 2 0.7 g. of olivine heated to 310° C. for 40 hrs. in a current of chlorine containing a little HCl gained 2 mg. in weight and was then very hygroscopic. There was no sublimate of FeC13; leaching of the residue with water gave a solution containing Mg together with chlorine corresponding to 1.5 mg. MgCl2, but no iron.

Page 814 Note 3 Prior, G. T., Min. Mag., 1913, vol. 17, p. 24.Google Scholar

Page 814 Note 4 Fletcher, L., ibid., 1894, vol. 10, p. 287.Google Scholar

Page 814 Note 5 This well is placed eccentrically, near the top of part A, rather than centrally as drawn, so that a larger boat can be accommodated.