Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-02T18:16:41.874Z Has data issue: false hasContentIssue false
  • English
  • Français

On some unusual twin-laws observed in the orthoclase crystals from Goodsprings, Nevada

Published online by Cambridge University Press:  14 March 2018

Julien Drugman
Get access Rights & Permissions [Opens in a new window]

Extract

The very abundant literature dealing with the twinning of felspar phenocrysts has put on record a surprisingly large number of twin-laws. Some of these have such complex indices that they have never been accepted; others are regarded as doubtful. Yet the authors of these have well-established reputations and the accuracy of their observations cannot be doubted. The difficulty lies in the interpretation of the results. Beside numerous examples of well-defined laws, one comes across a high percentage of isolated cases, each appearing quite as plausible as these, yet difficult to assign to any definite law.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 25 , Issue 160 , March 1938 , pp. 1 - 14
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1938

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 1 note 1 For example: Laspeyres, H., Zeits. Kryst. Min., 1877, vol. 1, p. 346 Google Scholar; Müller, W., ibid., 1890, vol. 17, p. 484 Google Scholar; Gozmard, F., Bull. Soc. Min. France, 1883, vol. 6, p. 265 Google Scholar; Vigier, A., ibid., 1909, vol. 32, p. 155.Google Scholar

page 1 note 2 Klockmann, F., Zeits. Kryst. Min., 1882, vol. 6, p.318.Google Scholar

page 1 note 3 Tschermak, G., Min. Petr. Mitt., 1879, vol. 2, p.499; 1887, vol. 8, p. 414.Google Scholar

page 1 note 4 Baumhauer, H., Zeits. Kryst. Min., 1899, vol. 31, p.252.Google Scholar

page 1 note 5 Viola, C., Zeits. Kryst. Min., 1900, vol. 32, pp. 309-37; 1902, vol. 36, p.234.Google Scholar

page 2 note 1 Fedorov, E. S. and Nikitin, W., quoted by Sabot, R., loc. cit., 1922, p. 110.Google Scholar

page 2 note 2 Goldschmidt, V. and Schröder, R., Beitr. Kryst. Min., 1923, vol. 2, p.118.[Min. Abstr. 3–213.]Google Scholar

page 2 note 3 Sabot, R., Bull. Soc. Franç, Min., 1922, vol. 45, p.97.[M.A. 2–347.]Google Scholar

page 2 note 4 Drugman, J., Bull. Soc. Franç, Min., 1925, vol. 48, p.254.[M.A. 3–380.]Google Scholar

page 5 note 1 Cf. Friedel, G., Étude sur les groupements cristallins. Bull. Soc. Indust. Minière, Saint-Étienne, 1904, ser. 4, vols. 3-4, p. 160.Google Scholar

page 7 note 1 Des Cloizeaux, A., Manuel Min., 1862, pl. 25, fig. 149.Google Scholar

page 7 note 2 Gonnard, F., Bull. Soc. Franç. Min., 1908, vol. 31, p.286.While suggesting (15.0.4) as a possible twin-plane, he recognizes that the association can he explained by two operations.Google Scholar

page 7 note 3 Vigier, A., Bull. Soc. Franç. Min., 1909, vol. 32, pp. 155–170.Google Scholar

page 8 note 1 Tschermak, G., Min. Petr. Mitt., 1887, vol. 8, p.414.Google Scholar

page 8 note 2 Goldschmidt, V. and Wright, F. E., Zeits. Kryst. Min., 1898, vol. 30, p.300.Google Scholar

page 8 note 3 Drugman, J., Bull. Soc. Franç. Min., 1928, vol. 51, p.193.[M.A. 4–37.]Google Scholar

page 9 note 1 Friedel, G., Bull. Soc. Franç. Min., 1933, vol. 56, p.262.[M.A. 5–428.]Google Scholar

page 10 note 1 Goldschmidt, V. and Paul, F., Zeits. Kryst. Min., 1909, vol 46, p. 471.Google Scholar

page 10 note 2 Müller, W., Zeits. Kryst. Min., 1890, vol. 17, p.484 Google Scholar

page 11 note 1 Mügge, O., Neues Jahrb. Min., 1890, vol. ii, p. 89.Google Scholar

page 13 note 1 Hintze, C., Handbuch Min., 1897, vol. 2, p.1342.Google Scholar