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Specific gravities of minerals: an index of some recent determinations

Published online by Cambridge University Press:  14 March 2018

L. J. Spencer
L. J. Spencer*
Affiliation:
British Museum (Natural History)
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Extract

As a first-aid in the identification of non-metallic minerals I have for many years made use of specific gravity, which is a character that can be easily and rapidly determined hy the use of heavy liquids. A small, clean fragment of the mineral to be tested is dropped into one or other of a series of tubes containing methylene iodide with various small known Crystals as indicators. Adding benzene from a dropping-bottle, the density of the liquid is quickly brought to that of the mineral. This preliminary determination of the specific gravity gives a useful clue as to the nature of the mineral—what it may or may not be ; and the same fragment can then be used for confirmatory optical and micro-chemical tests.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 21 , Issue 119 , December 1927 , pp. 337 - 365
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1927

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References

page 337 note 1 Spencer, L. J., Min. Mag., 1897, vol. 11, p. 186 Google Scholar.

page 338 note 1 Spencer, L. J., Min. Mag., 1904, vol. 14, p. 43 Google Scholar.

page 338 note 2 Min. Abstr., vol. 2, p. 487.

page 338 note 3 M. Websky, Die Mineral-Species nach den f¨r das specifische Gewicht derselben angenommenen und gefundenen Werthen. Breslau, 1868, vi + 170 pp.

page 339 note 1 See A. Hutchinson, A graphical method for the rapid correction of specific gravity determinations. Min. Mag., 1924, vol. 20, pp. 198-200, pl. IV ; Alhers, L., Zeits, Krist., 1924, vol. 59, p. 298 Google Scholar [ Min. Abstr., vol. 2, p. 374]

page 340 note 1 Forty-four values from the last number (no. 118) of the Magazine are not included in this diagram.

page 340 note 2 Min. Abstr., vol. 3, p. 178.

page 340 note 3 Min. Mag., 1903, vol. 13, p. 276.

page 341 note 1 Washington, H. S., Journ, Franklin Inst., 1920, vol. 190, p. 804 Google Scholar [Min. Abstr., vol. 1, p, 160].